To find gram atomic mass we keep the numerical value the some as the atomic mass, but simply change the units from u to g. for example, atomic mass of aluminium is 27 u. B. a dissolving agent. Physics. Chlorine. D. A) atomic element B) molecular element C) molecular compound D) ionic compound E) none of the above Answer: B Introductory Chemistry, 3e (Tro) Chapter 5: Molecules and Compounds 20) Ammonium fluoride is considered which of the following? chlorine. a homogenous mixture of substances. Why are all atomic masses not nearly whole numbers? What element with a mass number of 100 has 56 neutrons in its nucleus? How is the atomic mass unit (amu) defined? Nearby galaxies that have evolved along similar lines have a corresponding enrichment of elements heavier than hydrogen and helium. A) number of protons B) mass in grams C) Mass in amu D) number of electrons 1 See answer keyonnaraymo38 is waiting for your help. calcium. 20 terms. Which of the following is true about the element with atomic number 18? Ignoring the sign, which has a greater magnitude of charge? True B. What is the atomic number of this element? In a sample of 100 Sb atoms, what is the probability that a single selected atom has a mass of 121.76 amu. Which of the following should be classified as a solution? Learn vocabulary, terms, and more with flashcards, games, and other study tools. atomic masses are the weighted average of all naturally-occurring isotopes. Which two particles of the atom have nearly identical masses? Which of the following statements about atoms are true: Most of the atoms are made of empty space: Which of the following statements about atoms are true: Atoms that have the same atomic number are atoms with the same atomic element: If I129/53 is a stable, electrically neutral atom, how many neutrons are … 1. NCERT DC Pandey Sunil Batra HC Verma Pradeep Errorless. Which of the following is an atomic element? Let us help you simplify your studying. A. Learn on periodic table elements atomic structure with free interactive flashcards. C protons. Favorite Answer. (a) [ He ] 2s^1 (b) [ Ne ] 3s^23p^3 (c) [ Ar ] 4s^23d^1 What is the approximate atomic mass of X? c) 6.00 moles of sodium phosphate. The following graph (note log scale) shows abundance of elements in the Solar System.The table shows the twelve most common elements in our galaxy (estimated spectroscopically), as measured in parts per million, by mass. A) Atomic weight is determined by the number of electrons in an atom of a given element. An atom is the smallest unit of ordinary matter that forms a chemical element.Every solid, liquid, gas, and plasma is composed of neutral or ionized atoms. Choose from 500 different sets of on periodic table elements atomic structure flashcards on Quizlet. This is because the number of protons increases (sodium has 11, argon has 18) so the nuclear charge increases. 6.00 moles of sodium perchlorate contains the same number of atoms as a) 6.00 moles of potassium permanganate. Which of the following pairs represent isotopes? The atomic number of an atom is defined as which of the following? Study Flashcards On Biology off of Quizlet at Cram.com. The periodic table was created by grouping elements according to their properties. What properties did Rutherford use in the design of the gold foil experiment? In the plum pudding model of the atom, where is most of the mass of the atom? Hydrogen. None are stable as single atoms at STP. Relevance. C) Atomic weight of an element is approximately equal to the mass number of its most abundant isotope. Chemistry. (iii) Which atoms are indicated by the following configurations ? Which of the following parts of John Dalton's atomic theory were not correct? 31) The atomic mass of an element is equal to A) its mass number. Books. A period 4 element is one of the chemical elements in the fourth row (or period) of the periodic table of the elements. which of the following parts of dalton's was disproved by the discovery of the electron atoms are tiny particles atoms cannot be divided into smaller parts atoms have . Chemistry. If you are having trouble with Chemistry, Organic, Physics, Calculus, or Statistics, we got your back! In a sample of 100 Sb atoms, what is the probability that a single selected atom has a mass of 121.76 amu? They are so small that accurately predicting their behavior using classical physics—as if they were tennis balls, for example—is not possible due to quantum effects. If an atom of an element has atomic number = 15 and, mass number = 31, ind the number of protons, electrons, neutrons in its atoms. An element has an atomic number of 25 and an atomic mass of 51. Therefore, the attraction between the positive nucleus and negative electrons in the outer shell increases, so the atomic radius (the distance between the nucleus and the outer shell) decreases. B. neutrons. The relative amounts of each element vary by individual, mainly due to differences in the proportion of fat, muscle and bone in their body. Two naturally occurring isotopes of antimony are ¹²¹Sb (57% abundant) and ¹²³Sb (43% abundant). Gerry_Vy. C) one-twelfth of the mass of a carbon-12 atom. If you are having trouble with Chemistry, Organic, Physics, Calculus, or Statistics, we got your back! The element antimony (Sb) has an atomic mass of 121.76 amu. B) its atomic number. oxygen. Which of the following options correctly describe the arrangement of the periodic table? Learn vocabulary, terms, and more with flashcards, games, and other study tools. Which of the following is true of atomic weight? asked Aug 7, 2017 in Chemistry by sforrest072 ( 128k points) Which of the following does NOT describe the element bromine (Br)? All five are elements, which means they have atoms. The atomic number of an element is 5 and mass number is 11. 7 years ago. HHD CHAPTER 2 GLOSSARY. Add your answer and earn points. Which of the following is an atomic element? Which of the following particles are of approximately equal mass? All of the above. a. Hydrogen b. Now answer the following questions. 26. Cram.com makes it easy to get the grade you want! (false) 3. atoms can't be subdivided, created, or destroyed (false) 4. atoms of different elements can combine w/ one another to form compounds 5. chemical reactions occur when atoms are seperated, joined, or rearranged Identify the element of Period 2 which has the following successive ionization energies, in kJ/mol. IE 1 , 1314 IE 2 , 3389 IE 3 , 5298 IE 4 , 7471 IE 5 , 10992 IE 6 , 13329 IE 7 , 71345 IE 8 , 84087 atomic number = number of protons = number of electrons. An unknown substance was shown to contain a metal element with an atomic mass between 69 and 70. B) Atomic weight of an element is approximately equal to the number of protons in its nucleus. NCERT P Bahadur IIT-JEE Previous Year Narendra Awasthi MS Chauhan. b. ... OTHER QUIZLET SETS. Which of the following best explains why the atomic mass is a fraction between 72 and 73? Solved: Which of the following is an atomic element? Which of the following is a lanthanide element? solution. Anonymous. Atomic Mass of Some ElementsGram atomic mass Gram atomic mass of an element is defined as that much quantity of the element whose mass expressed in grams is numerically equal to its atomic mass. Our videos prepare you to succeed in your college classes. The groups are numbered 1 to 7. Start studying Chemistry Chapter 5. Start studying Chapter 17. Which of the following is true about the element with atomic number 18? Which scientist determined that almost all of an atom's mass of is located in its nucleus? 2.atoms of the same element are identical in size, mass, etc. Atoms are extremely small, typically around 100 picometers across. Which of the following atoms has the same number of neutrons as ⁵⁹Ni? Click hereto get an answer to your question ️ (i) Write the electronic configurations of the following ions: (a) H^-(b)Na^+(c)O^2 - (d)F^- . Which of the following is an atomic element? d) 6.00 moles of barium… A: muddy water B: a soft drink with no fizz C: foam D: soil 2. Answer Save. Which of the following elements is a trace element. 1.the modern atomic model includes orbiting the nucleus. Quickly memorize the terms, phrases and much more. It has __[x]___ neutrons. c. To which period does this element belong? 1. all matter is composed of extremely small particles (atoms). Get an answer for 'The number of _____ in an atom determines what type of element it is. Our videos will help you understand concepts, solve your homework, and do great on your exams. Nitrogen. If the atomic mass of Eu is 151.96, what is the approximate natural abundance of ¹⁵¹Eu? Select all that apply. (ii) What are the atomic numbers of elements whose outermost electrons are represented by (a)3s^1(b)2p^3 and (c)3d^1 ? This is also known as the number of protons within an element. The sum of the protons and neutrons in a nucleus is __________. Two naturally occurring isotopes of antimony are ¹²¹Sb (57% abundant) and ¹²³Sb (43% abundant). d. With which of the following elements would this element resemble? a. Which of the following is true for any atom? What can you conclude from the deflection of a cathode ray in a magnetic field? D) a weighted average mass of all of the naturally occurring isotopes of the element. Calcium. 1. What is the atomic number for an element whose mass number is 78 and contains 36 neutrons? What is the group of this element? Atomic number indicates which of the following See answer Dee245 is waiting for your help. A. protons B. electrons C. neutrons D. quarks 4. Democritus believed that matter was made up of _______. John Dalton's ideas about atoms were similar to those of __________, the ray must be composed of charged particles. Neutral atoms of all isotopes of a given element have the same. A. Oxygen. 1 Answer. b) 6.00 moles of sodium hydroxide. alpha particle's positive charge and electron's negative charge. Which element has the smallest atomic radius in period 3? A. molecules. Let us help you simplify your studying. An atom of the isotope ¹³³Cs contains how many protons (p), neutrons (n), and electrons (e)? nitrogen. The atomic number of an electrically neutral atom is equal to the number of: Choose all that apply. An element has its electron configuration as 2,8,2. What is the mass number for an atom of xenon containing 54 protons and 76 neutrons? Which of the following particles has a mass that is almost the same as the mass of a proton? False 3. Our videos will help you understand concepts, solve your homework, and do great on your exams. Which of the following elements would be chemically similar to calcium (Ca)? The atomic mass of germanium (Ge) on the periodic table is 72.630 amu. About 29 of these elements are thought to play an active positive role in life and health in humans. Aristotle said that ________ cannot exist. The average 70 kg (150 lb) adult human body contains approximately 7 × 10 27 atoms and contains at least detectable traces of 60 chemical elements. calcium. An unknown element X has the following isotopes: ⁵²X (90.00% abundant), ⁴⁹X (8.00% abundant), ⁵⁰X (2.00% abundant). There are two naturally occurring isotopes of europium, ¹⁵¹Eu (151.0 amu) and ¹⁵³Eu (153.0 amu). Actinoid element, also called actinide element, any of a series of 15 consecutive chemical elements in the periodic table from actinium to lawrencium (atomic numbers 89–103). Equanimity Equanimity The atomic number of an element gives the element it's identity. solvent. The element antimony (Sb) has an atomic mass of 121.76 amu. asked Oct 16, 2020 in Chemistry by Kaanta ( … Our videos prepare you to succeed in your college classes. Find the number of electrons, protons and neutrons present in an atom of it. Elements in the modern periodic table are arranged in order of increasing atomic mass. As a group, they are significant largely because of their radioactivity.Although several members of the group, including uranium (the most familiar), occur naturally, most are man-made. substance thats dissolved. hydrogen. The atomic number of an element is defined by its number of ________. a) hydrogen b) bromine c) oxygern d) lithium e) fluorine 2. If the atomic number of an element is 16, then it has 16 electrons. With which of the following elements is it most likely grouped? C. Elements in the same group have similar chemical properties.
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