Periodicity and Chemical Bonding

Question 1

Volume can be accurately measured with _____

Accepted Answer

a graduated cylinder, a pipette

Question 2

How many protons does an atom of atomic mass 46 with 26 neutrons contain?

Accepted Answer

20

Question 3

Electron affinity describes the energy released as an electron is added to an atom

Accepted Answer

True

Question 4

A covalent compound (a molecule) is typically formed between a _____ and a _____

Accepted Answer

nonmetal, nonmetal

Question 5

As I move from left (group 1) to right (group 8) on the periodic table electron affinity _____

Accepted Answer

increases

Question 6

According to the Rule of 1.7 when atoms with an electronegativity difference between 0.4 and 1.7 or less a/an ____

Accepted Answer

polar covalent bond is formed

Question 7

The element in group 6 period 4 is _____

Accepted Answer

Selenium (Se)

Question 8

All elements in groups 1 and 2 on the periodic table are _____

Accepted Answer

metals

Question 9

The two regions of an atom are _____ and _____

Accepted Answer

nucleus, electron cloud

Question 10

All the elements in group 2 (the alkaline earth metals) of the periodic table form _____ ions

Accepted Answer

2+

Question 11

The first element in H2O is a/an _____

Accepted Answer

non-metal

Question 12

When a molecule contains polar bonds and is asymmetrical it is _____

Accepted Answer

polar

Question 13

periodic trends are influenced by _____

Accepted Answer

electron - electron repulsion

Question 14

When listed in decreasing order of radius the following order is correct Te2- > I- > Xe > Cs+ > Ba2+

Accepted Answer

True

Question 15

As I move from left (group 1) to right (group 8) on the periodic table ionization energy _____

Accepted Answer

increases

Question 16

All elements in group 8 (the noble gases) of the periodic table _____

Accepted Answer

have 8 valence electrons

Question 17

In chemistry, as in the rest of science and all but 3 nations of the world, we use the following system of measurements

Accepted Answer

metric

Question 18

An ionic bond is formed when _____

Accepted Answer

an electron transfers from one atom to another

Question 19

periodic trends are influenced by _____

Accepted Answer

effective nuclear charge

Question 20

periodic trends are influenced by _____

Accepted Answer

electron shielding

Question 21

Chemistry is the study of _____

Accepted Answer

matter and its properties and behaviors

Question 22

CO2 is a _____ compound

Accepted Answer

covalent

Question 23

The first element in MgO is a _____ and the second element is _____

Accepted Answer

metal, nonmetal

Question 24

As I move from top (period 1) to bottom (period 7) electron affinity _____

Accepted Answer

decreases

Question 25

When the elements in group 6 of the periodic table form ions their radius _____

Accepted Answer

increases

Question 26

As I move from top (period 1) to bottom (period 7) ionization energy _____

Accepted Answer

decreases

Question 27

The three particles that comprise an atom are _____, _____ and _____

Accepted Answer

protons, neutrons and electrons

Question 28

the modern periodic table is arranged by ______

Accepted Answer

atomic number

Question 29

A sodium cation (Na+) is _____ a sodium (Na) atom

Accepted Answer

smaller than

Question 30

As I move from left (group 1) to right (group 8) on the periodic table atomic radius _____

Accepted Answer

decreases

Question 31

This Russian chemist is credited as the father of the modern periodic table.

Accepted Answer

Dmitri Mendeleev

Question 32

An ionic compound typically forms between a _____ and a _____

Accepted Answer

metal, nonmetal

Question 33

All elements within the same group have the same _____

Accepted Answer

number of valence electrons

Question 34

The number of covalent bonds a non-metal will form can be accurately predicted by the number of valance electrons it has

Accepted Answer

True

Question 35

periodic trends are influenced by _____

Accepted Answer

atomic radius

Question 36

An anion (a negative ion) is formed when an atom _____

Accepted Answer

gains electrons

Question 37

The columns on the periodic table are _____

Accepted Answer

families, groups

Question 38

All atoms of the same element have the same number of _____

Accepted Answer

Protons

Question 39

Atomic number is determined by the number of protons and neutrons in the nucleus

Accepted Answer

False

Question 40

All atoms within the same period have the same number of _____

Accepted Answer

energy levels

Question 41

All elements within period 6 have _____ energy levels

Accepted Answer

6

Question 42

According to the Rule of 1.7 when two atoms with an electronegativity difference of 0.4 or less a/an ____

Accepted Answer

nonpolar covalent bond is formed

Question 43

All elements in Group 17 (the halogens) of the periodic table _____

Accepted Answer

have 7 valence electrons

Question 44

Valence electrons are _____

Accepted Answer

the electrons in the outermost shell of an atom

Question 45

According to the Rule of 1.7 when two atoms with an electronegativity difference of 1.7 or greater a/an ____

Accepted Answer

ionic bond is formed

Question 46

Ionization energy describes the energy released as an electron is added to an atom

Accepted Answer

False

Question 47

All the elements in group 3 of the periodic table have _____ valence electrons

Accepted Answer

3

Question 48

The rows on the periodic table are _____

Accepted Answer

periods

Question 49

As I move from top (period 1) to bottom (period 7) atomic radius _____

Accepted Answer

increases

Question 50

A cation (positive ion) is formed when an atom _____

Accepted Answer

Loses an electron

Question 51

A covalent bond forms when two atoms _____

Accepted Answer

share electrons

Question 52

The Octet Rule states that elements have a stable electron configuration when they have _____ electrons in their valence

Accepted Answer

8

Question 53

NaCl is a/an _____ compound

Accepted Answer

ionic

Periodicity and Chemical Bonding

Questions 53

Periodicity and Chemical Bonding

Questions 53