Multiple Choice

Question 1

And element has an atomic number of 76. How many p and e?

Answer 1

76

Question 2

The sum of the protons and neutrons in an atom equals the _______

Answer 2

Mass number

Question 3

All atoms of the same element have the same____.

Answer 3

Number of protons

Question 4

The mass number of an element is equal to_____.

Answer 4

P and n in the nucleus

Question 5

In the Bohr model of an atom, an electron in the orbit has a fixed_____.

Answer 5

Energy

Question 6

The shape(not the size) of an electron cloud is determined by the electron’s _______________.

Answer 6

Energy Sublevel

Question 7

The letter “p” is the symbol 4p^3 indicates the ________.

Answer 7

Orbital shape

Question 8

The particles found in the nucleus of an atom are____

Answer 8

Proton,neutron

Question 9

The atomic mass of an element is the ______.

Answer 9

Weighted average of masses of isotopes

Question 10

The light given off by an electric discharge through sodium vapor is _______.

Answer 10

Emission spectrum

Question 11

Each period of the periodic table corresponds to _______.

Answer 11

Principal energy level

Question 12

The modern periodic table is arranged in order of increasing atomic ________.

Answer 12

Number

Question 13

To what category of elements does an element belong if it is a poor conductor of electricity?

Answer 13

Non metals

Question 14

Elements that are characterized by the filling of p orbitals are classified as __________.

Answer 14

Groups 3A-8A

Question 15

Compared with electronegatives of the elements on the left side of the periodic table, the electronegatives on the right side tend to be _________.

Answer 15

Higher

Question 16

The octet rule states that, in chemical compounds, atoms tend to have ________.

Answer 16

Noble gas configurations

Question 17

The electron configuration of a fluoride ion, f-1 , is _________.

Answer 17

1s^2 2s^2. 2p^6

Question 18

A compound held together by ionic bonds is called a _______.

Answer 18

Salt

Question 19

Which is true about the melting temperature of potassium chloride??

Answer 19

It is very high

Question 20

When one atom contributes both bonding electrons in a single covalent bond, the bond is Called a(n)?

Answer 20

Coordinate covalent bond

Question 21

A bond formed between a silicon atom and an oxygen atom is likely to be __________.

Answer 21

Polar covalent

Question 22

Binary molecular compounds are made of two _____.

Answer 22

Nonmetallic elements

Question 23

In naming a binary molecular compound, the number of atoms each element present in the molecule is indicated by __________.

Answer 23

Prefixes

Question 24

When naming acids, the prefix hydro- is used when the name of the acid anion ends in _______.

Answer 24

-ide

Question 25

When the name of an anion that is part of an acid ends in -ite, the acid name includes the suffix ______.

Answer 25

Ous

Question 26

In any chemical compound,the elements are always combined in the same proportion by ______.

Answer 26

Mass

Question 27

Seperating a solid from a liquid by evaporating the liquid is called _________.

Answer 27

Distillation

Question 28

A substance that can be separated into two or more substances only by a chemical change is called a ________.

Answer 28

Compound

Question 29

List number of protons, neutrons, and electrons in 13/6 C

Answer 29

P= 6 n=7 e=6

Question 30

The element chromium has four naturally occurring isotopes. Use relative abundance to calculate. 50Cr= 4.34% 52Cr=83.79% 53Cr=9.50% 54Cr=2.37%

Answer 30

52 amu

Question 31

Give electron configuration of chlorine.

Answer 31

1s^2 2s^2. 2p^6. 3s^2. 3p^5.

Question 32

Write electron configuration for chromium.

Answer 32

1s^2. 2s^2. 2p^6. 3s^1. 3p^6. 4s^1. 3d^5

Question 33

Give electron configuration for iodine and it’s -1 ion.

Answer 33

{Kr} 5s2. 4d10 4f14. 5p5.

{Kr} 5s2. 4d10. 4f14. 5p6