Question

The nucleus of an atom has all of the following characteristics except that it a. is very dense. b. is positively charged. c. contains protons and neutrons. d. contains almost all of the atom's volume. 2. What makes an atom electrically neutral? a. The neutrons balance out the protons and electrons. b. The nuclear forces contained in the atom neutralize the atom. c. The number of protons is equal to the number of electrons. d. The number of protons is equal to the number of neutrons. 3. What does the number 91 represent in the name zirconium-91? a. the atomic number b. the number of protons c. the mass number d. the sum of protons and electrons 4. Isotopes of the same element have different a. chemical properties. b. masses. c. atomic numbers. d. number of protons. 5. All atoms of the same element have the same a. number of protons. b. mass number. c. number of neutrons. d. protons and neutrons. 6. Which quantity can vary among neutral atoms of the same element? a. mass number b. atomic number c. number of protons d. number of electrons 7. Which of the following equals one atomic mass unit (amu)? a. the mass of protons plus neutrons b. 1/12 the mass of one carbon-12 atom c. mass of one electron d. the mass of one atom of carbon-12 8. Bohr's model of the atom shows the electrons a. are mixed evenly with the positive charge. b. are found orbiting a positively charged nucleus. c. are found orbiting a positively charged nucleus in energy levels he called orbits. d. are found in regions of probability around the nucleus called orbitals. 9. Which of the following would best describe Thomson's model? a. are mixed evenly with the positive charge. b. are found orbiting a positively charged nucleus. c. are found orbiting a positively charged nucleus in energy levels he called orbits. d. are found in regions of probability around the nucleus called orbitals. 10. An atom that has 15 protons and 16 neutrons is an isotope of what element? a. copper b. phosphorus c. gallium d. sulfur 

          The nucleus of an atom has all of the following characteristics except that it
a. is very dense.
b. is positively charged.
c. contains protons and neutrons.
d. contains almost all of the atom's volume.

2. What makes an atom electrically neutral?
a. The neutrons balance out the protons and electrons.
b. The nuclear forces contained in the atom neutralize the atom.
c. The number of protons is equal to the number of electrons.
d. The number of protons is equal to the number of neutrons.

3. What does the number 91 represent in the name zirconium-91?
a. the atomic number
b. the number of protons
c. the mass number
d. the sum of protons and electrons

4. Isotopes of the same element have different
a. chemical properties.
b. masses.
c. atomic numbers.
d. number of protons.

5. All atoms of the same element have the same
a. number of protons.
b. mass number.
c. number of neutrons.
d. protons and neutrons.

6. Which quantity can vary among neutral atoms of the same element?
a. mass number
b. atomic number
c. number of protons
d. number of electrons

7. Which of the following equals one atomic mass unit (amu)?
a. the mass of protons plus neutrons
b. 1/12 the mass of one carbon-12 atom
c. mass of one electron
d. the mass of one atom of carbon-12

8. Bohr's model of the atom shows the electrons
a. are mixed evenly with the positive charge.
b. are found orbiting a positively charged nucleus.
c. are found orbiting a positively charged nucleus in energy levels he called orbits.
d. are found in regions of probability around the nucleus called orbitals.

9. Which of the following would best describe Thomson's model?
a. are mixed evenly with the positive charge.
b. are found orbiting a positively charged nucleus.
c. are found orbiting a positively charged nucleus in energy levels he called orbits.
d. are found in regions of probability around the nucleus called orbitals.

10. An atom that has 15 protons and 16 neutrons is an isotope of what element?
a. copper
b. phosphorus
c. gallium
d. sulfur
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Added by Robert H.

Chemistry: Structure and Properties
Chemistry: Structure and Properties
Nivaldo Tro 2nd Edition
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The nucleus of an atom has all of the following characteristics except that it a. is very dense. b. is positively charged. c. contains protons and neutrons. d. contains almost all of the atom's volume. 2. What makes an atom electrically neutral? a. The neutrons balance out the protons and electrons. b. The nuclear forces contained in the atom neutralize the atom. c. The number of protons is equal to the number of electrons. d. The number of protons is equal to the number of neutrons. 3. What does the number 91 represent in the name zirconium-91? a. the atomic number b. the number of protons c. the mass number d. the sum of protons and electrons 4. Isotopes of the same element have different a. chemical properties. b. masses. c. atomic numbers. d. number of protons. 5. All atoms of the same element have the same a. number of protons. b. mass number. c. number of neutrons. d. protons and neutrons. 6. Which quantity can vary among neutral atoms of the same element? a. mass number b. atomic number c. number of protons d. number of electrons 7. Which of the following equals one atomic mass unit (amu)? a. the mass of protons plus neutrons b. 1/12 the mass of one carbon-12 atom c. mass of one electron d. the mass of one atom of carbon-12 8. Bohr's model of the atom shows the electrons a. are mixed evenly with the positive charge. b. are found orbiting a positively charged nucleus. c. are found orbiting a positively charged nucleus in energy levels he called orbits. d. are found in regions of probability around the nucleus called orbitals. 9. Which of the following would best describe Thomson's model? a. are mixed evenly with the positive charge. b. are found orbiting a positively charged nucleus. c. are found orbiting a positively charged nucleus in energy levels he called orbits. d. are found in regions of probability around the nucleus called orbitals. 10. An atom that has 15 protons and 16 neutrons is an isotope of what element? a. copper b. phosphorus c. gallium d. sulfur
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Transcript

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00:01 Come here in this question we have multiple questions so the first question is the nucleus of an atom so nucleus of an atom is having the following except they are asking so exception we have to give for nucleus so for nucleus it is positively charged as it is correct it is very dense because mass is present in this compound and in the nucleus only it contains protons and neutrons acid is also correct contains almost all of the so d option is the wrong option so which is the exception case for nucleus and the second thing is the neutrons so here what makes an atom so why an atom is electrically neutral so this is electrically neutral so what is the reason for this one? positively charged and negatively charged particles are in the same number.
01:14 Same number.
01:15 So that is protons and neutrons are in the same number.
01:19 That is the correct answer here.
01:20 If you see here, the neutrons balance out the protons and electrons.
01:25 It is wrong.
01:26 The nuclear force contains in the atom, neutralize the atom.
01:33 So it is also wrong.
01:35 The number of protons is equal to number of electrons.
01:38 So option c is a correct answer for this one.
01:42 Now, the third question is here it is what does the number 91 represents in the zirconium 91? so in zirconium 91, 91 represents the mass of the nucleus.
02:01 So atomic number the number of protons mass number so option c is a correct answer so now this one is the mass number so for zycoleum the atomic number is 41 so mass number is 91 and the fourth question is here um this is four isotopes of the same element have different so isotopes are having isotopes are having the same atomic number chemical properties and mass so masses is given number of protons all items are so here it is isotopes of the same element are have different so which is the difference so masses is the difference so option b is the correct answer for fourth one and fifth one it is the question that is a question that is a all atoms of the same element have the same so all atoms of the same element have the same number of protons number of neutrons mass number protons and neutrons so same protons we can say so atoms of all elements can have the same number of proteins but not mass number so there isotopes are present so same number of protons is present in option so here if you see the option we have mass number of neutrons number of protons so option a is our correct answer for this one and we go to the sixth question which quantity of can vary from among neutral atoms of the same element so which quantity will change here mass number is changes and atomic number of protons number of electrons is given here so a mass number is the correct answer option a is the correct answer so it can be vary here for the same elements and seventh question which of the following equals one atomic mass units.
04:28 So one atomic mass units of the proton.
04:31 So mass of proton plus neutrons, mass of electrons, and 1 divided by 12 of mass of 1 carbon...
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