Question 1

The periodic table shows that a carbon atom has six protons. This means that a carbon atom also has

Accepted Answer

Six electrons

Answer

Six neutrons

Answer

An atomic mass that equals six

Answer

More protons than electrons

Question 2

Ina positive ion (Cation), there are __________ electrons __________ protons.

Accepted Answer

less, than

Answer

no, and

Answer

more, than

Answer

equal, and

Question 3

Atoms of ¹⁶O,¹⁷O, and ¹⁸O have the same number of __________.

Accepted Answer

protons, but a different number of neutrons

Answer

protons, but a different number of electrons

Answer

neutrons, but a different number of protons

Answer

electrons, but a different number of protons

Question 4

The symbol, $_{Z}^{A}\mathrm{X}$ , A is ____.

Accepted Answer

the mass number

Answer

the isotope number

Answer

the atomic number

Answer

the number of neutron

Question 5

How many electrons does Mg⁺² ion have? (Mg: Z 12)

Accepted Answer

10

Answer

6

Answer

24

Answer

12

Question 6

A Ca²⁺ion differs from a Ca⁰ atom in that the Ca²⁺ ion has________.

Accepted Answer

fewer electrons

Answer

more protons

Answer

more electrons

Answer

fewer protons

Question 7

How many protons and electrons are in _{$_{13}^{27}\mathrm{Al} ^{3+}$}?

Accepted Answer

13 protons, 10 (13 – 3) electrons

Answer

13 protons, 16 (13 +3) electrons

Answer

13 protons, 27 electrons

Answer

27 protons, 13 electrons

Question 8

How many protons and electrons are there in $_{Z}^{A}\mathrm{X}$

Accepted Answer

34 protons, 36 (34 + 2) electrons

Answer

34 protons, 32 (34-2) electrons

Answer

34 protons, 2 electrons

Answer

78 protons, 34 electrons

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