BIOLOGY HONORS REVIEW -- ATOMIC STRUCTURE

Every chlorine atom has 1) 7 electrons (2) 17 neutrons (3) a mass number of 35 (4) an atomic number of 17

(4) an atomic number of 17

What is the net charge of an ion that has 11 protons, 10 electrons, and 12 neutrons? 1) 1+ 2) 2+ 3) 1- 4) 2-

1) 1+

The number of protons found in an H2O molecule is 1) 10 2) 8 3) 3 4) 4

1) 10

What is the atomic number of an element that has six protons and eight neutrons? 1) 6 2) 2 3) 8 4) 14

1) 6

All phosphorus atoms have the same 1) Atomic number 2) Mass number 3) Number of neutrons plus the number of electrons 4) Number of neutrons plus the number of protons

1) Atomic number

The elements on the periodic table of the elements are arranged in order of increasing 1) Atomic number 2) Mass number 3) Number neutrons 4) Number of valence electrons

1) Atomic number

A sample of matter must be copper if 1) Each atom in the sample as 29 protons 2) Atoms in the sample react with oxygen 3) The sample melts at 1768K 4) The sample can conduct electricity

1) Each atom in the sample as 29 protons

The atomic number of an atom is always equal to the number of its 1) Protons, only 2) Neutrons, only 3) Protons plus neutrons 4) Protons plus electrons

1) Protons, only

What is the number of electrons in a potassium atom? 1) 18 2) 19 3) 20 4) 39

2) 19

What is the overall charge of an ion that has 12 protons, 10 electrons, and 14 neutrons? 1) 2- 2) 2+ 3) 4- 4) 4+

2) 2+

An ion that consists of 7 protons, 6 neutrons, and 10 electrons has a net charge of 1) 4- 2) 3- 3) 3+ 4) 4+

2) 3-

An orbital is a region in an atom where there is a high probability of finding 1) An alpha particle 2) An electron 3) A neutron 4) A positron

2) An electron

On the Periodic Table, the number of protons in an atom of an element is indicated by its 1) Atomic mass 2) Atomic number 3) Selected oxidation states 4) Number of valence electrons

2) Atomic number

The results of the gold foil experiment led to the conclusion that an atom is 1) Mostly empty space and has a small, negatively charged nucleus 2) Mostly empty space and has a small, positively charged nucleus 3) A hard sphere and has a large, negatively charged nucleus 4) A hard sphere and has a large, positively charged nucleus

2) Mostly empty space and has a small, positively charged nucleus

The stability of an isotope is related to its ratio of 1) Neutrons to positrons 2) Neutrons to protons 3) Electrons to positrons 4) Electrons to protons

2) Neutrons to protons

Which subatomic particles are matched with their charges? 1) Protons are positive and neutrons are negative 2) Protons are positive and electrons are negative 3) Protons are negative and neutrons have no charge 4) Protons are negative and electrons have no charge

2) Protons are positive and electrons are negative

Atoms are neutral because the number of 1) Protons equals the number of neutrons 2) Protons equals the number of electrons 3) Neutrons is greater than the number of protons 4) Neutrons is greater than the number of electrons

2) Protons equals the number of electrons

Two atoms that are different isotopes of the same element have 1) The same number of protons and the same number of neutrons 2) The same number of protons but a different number of neutrons 3) A different number of protons but the same number of neutrons 4) A different number of protons and a different number of neutrons

2) The same number of protons but a different number of neutrons

The atomic mass of an element is the weighted average of the atomic masses of 1) the least abundant isotopes of the element 2) the naturally occurring isotopes of the element 3) the artificially produced isotopes of the element 4) the natural and artificial isotopes of the element

2) the naturally occurring isotopes of the element

What is the total charge of the nucleus of a carbon atom? 1) -6 2) 0 3) +6 4) +12

3) +6

What is the total charge of the nucleus of a nitrogen atom? 1) +5 2) +2 3) +7 4) +1

3) +7

What phrase best describes an Al atom?1 1) A negatively charged nucleus, surrounded by negatively charged electrons 2) A negatively charged nucleus, surrounded by negatively charged electrons 3) A positively charged nucleus, surrounded by negatively charged electrons 4) A positively charged nucleus, surrounded by positively charged electrons

3) A positively charged nucleus, surrounded by negatively charged electrons

Which subatomic particles each have a mass of approximately 1u? 1) Proton and electron 2) Neutron and electron c 4) Neutron and positron

3) Proton and neutron

Which particles are found in the nucleus of an argon atom? 1) Protons and electrons 2) Positrons and neutrons 3) Protons and neutrons 4) Positrons and electrons

3) Protons and neutrons

An ion that consists of 7 protons, 9 neutrons, and 10 electrons has a net charge of 1) 2- 2) 2+ 3) 3+ 4) 3-

4) 3-

Which electron shell in an atom of calcium in the ground state has an electron with the greatest amount of energy? 1) 1 2) 2 3) 3 4) 4

4) 4

An atom in the ground state has two electrons in its first shell and six electrons in its second shell. What is the total number of protons in the nucleus of this atom? 1) 5 2) 2 3) 7 4) 8

4) 8

The mass of an electron is 1) Equal to the mass of a proton 2) Equal to the mass of a neutron 3) Grater than the mass of a proton 4) Less than the mass of a neutron

4) Less than the mass of a neutron

Which particles have approximately the same mass 1) Alpha particle and beta particle 2) Alpha particle and proton 3) Neutron and positron 4) Neutron and proton

4) Neutron and proton