Quiz about Chemchem

Question 1

When naming ionic compounds, you never change the spelling of the anion if it is a nonmetal.

Accepted Answer

False

Answer

True

Question 2

When naming covalent compounds, the spelling of metals is never changed.

Accepted Answer

True

Answer

False

Question 3

Sodium and lithium can combine to form a covalent compound.

Accepted Answer

False

Answer

True

Question 4

Ionic bonding is the result of an electrostatic attraction between a positive and negative ion.

Accepted Answer

True

Answer

False

Question 5

Covalent compounds share electrons to fulfill the octet rule.

Accepted Answer

True

Answer

False

Question 6

Ionic compounds are usually crystals.

Accepted Answer

True

Answer

False

Question 7

In contrast to ionic compounds, covalent compounds usually have a lower melting point.

Accepted Answer

True

Answer

False

Question 8

Valence electrons are the electrons in the outer s and p sublevels that are available for bonding.

Accepted Answer

True

Answer

False

Question 9

Nitrogen will obtain 3 electrons to obey the octet rule.

Accepted Answer

True

Answer

False

Question 10

Helium has 8 valence electrons just like the other noble gases.

Accepted Answer

False

Answer

True

Question 11

A calcium ion has a charge of 2+.

Accepted Answer

True

Answer

False

Question 12

The halogens have 6 valence electrons.

Accepted Answer

False

Answer

True

Question 13

The transition metals often are capable of forming two or more ions with differing charges.

Accepted Answer

True

Answer

False

Question 14

Elements in group 6A form -2 ions.

Accepted Answer

True

Answer

False

Question 15

Almost all the mass of an atom is contained within the electron cloud.

Accepted Answer

False

Answer

True

Question 16

The nucleus has a positive charge.

Accepted Answer

True

Answer

False

Question 17

Ionization energy increases as you go up the periodic table because shielding decreases in that direction.

Accepted Answer

True

Answer

False

Question 18

Atomic radius increases as you go down the periodic table and as you move to the left.

Accepted Answer

True

Answer

False

Question 19

Ionization energy increases as you move to the right on the periodic table because of shielding or an increase in energy levels.

Accepted Answer

True

Answer

False

Question 20

All the noble gases have 2 electrons in their outer s orbital and 6 electrons in the outer p orbital.

Accepted Answer

False

Answer

True

Question 21

Atomic mass is a weighted average of the known isotopes for an element.

Accepted Answer

True

Answer

False

Question 22

The mass of an electron is about equal to the mass of a proton or neutron.

Accepted Answer

False

Answer

True

Question 23

Metals form cations and nonmetals form anions.

Accepted Answer

True

Answer

False

Question 24

Nitrogen forms a nitride ion with a 3- charge.

Accepted Answer

True

Answer

False

Question 25

Alpha decay results in the atomic number decreasing by four and the mass number decreasing by 2.

Accepted Answer

False

Answer

True

Question 26

A nucleus goes through decay to become more stable if the neutron/proton ratio exceeds a value of 1.

Accepted Answer

True

Answer

False

Question 27

Of the four types of nuclear radiation, beta decay is the most harmful.

Accepted Answer

False

Answer

True

Question 28

The mass number for oxygen is 15.

Accepted Answer

False

Answer

True

Question 29

The atomic mass of oxygen is 15.99.

Accepted Answer

True

Answer

False

Question 30

There are five significant figures in the following data: 1.05050000 kilometers.

Accepted Answer

True

Answer

False

Question 31

The most common isotope of hydrogen has 1 neutron.

Accepted Answer

False

Answer

True

Question 32

Carbon-12 is very radioactive.

Accepted Answer

False

Answer

True

Question 33

Neptunium has 145 neutrons.

Accepted Answer

True

Answer

False

Question 34

Emitted gamma radiation does not affect the mass of the nucleus if it is given off during nuclear decay.

Accepted Answer

True

Answer

False

Question 35

Calcium has a greater ionization energy and a greater atomic radius than potassium, rubidium, and strontium.

Accepted Answer

False

Answer

True

Question 36

What happens to the atomic number and mass number during alpha decay?

Accepted Answer

Atomic number decreases by 2, mass number decreases by 4

Answer

Atomic number increases by 2, mass number decreases by 4

Answer

Atomic number decreases by 4, mass number decreases by 2

Answer

Atomic number stays the same, mass number decreases by 4

Question 37

During beta decay, what happens to the atomic number?

Accepted Answer

It increases by 1

Answer

It decreases by 1

Answer

It stays the same

Answer

It decreases by 2

Question 38

Which element has the largest atomic radius?

Accepted Answer

Cesium

Answer

Sodium

Answer

Fluorine

Answer

Neon

Question 39

Which element has the smallest atomic radius?

Accepted Answer

Helium

Answer

Cesium

Answer

Francium

Answer

Carbon

Question 40

What is the charge of the carbonate ion?

Accepted Answer

2-

Answer

1-

Answer

3-

Answer

2+

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