Test Review

Question 1

More abundant isotopes will have ____ affect on the average atomic mass of an element.

Accepted Answer

more

Question 2

Which word means: part of an atom made of protons and neutrons

Accepted Answer

nucleus

Question 3

What word means a unit of measurement in grams of 1 mol of a substance

Accepted Answer

molar mass

Question 4

Avogadro's constant is useful for

Accepted Answer

counting atoms.

Question 5

As you move left to right across the periodic table, both elements have

Accepted Answer

both more protons and higher mass numbers

Question 6

Dalton's atomic theory was more successful than Democritus's theory because it

Accepted Answer

had a scientific basis.

Question 7

Which of these statements are not part of Dalton's atomic theory?

Accepted Answer

Atoms are made of electrons.

Question 8

Which word means: reactive elements of Group 17 that are poor conductors

Accepted Answer

halogens

Question 9

Which word means: elements that have properties of both metals and nonmetals

Accepted Answer

semiconductors

Question 10

What is the mass of 2.5 mol of Ca, which has a molar mass of 40 g/mol?

Accepted Answer

100.0 g Ca

Question 11

The three main groups of elements are metals, non-metals, and

Accepted Answer

semiconductors.

Question 12

Which word means: Group 2 elements that have two valence electrons

Accepted Answer

alkaline-earth metals

Question 13

The periodic table organizes elements into groups that have similar

Accepted Answer

properties.

Question 14

Which word means: negatively charged particles found in the outermost energy level of an atom

Accepted Answer

valence electrons

Question 15

Elements that have one valence electron tend to

Accepted Answer

all of the other answers are correct

Question 16

Which word means: substances that are made of the same type of atoms

Accepted Answer

elements

Question 17

Two or more atoms may join together to form

Accepted Answer

molecules

Question 18

Which of the following is NOT true about noble gases?

Accepted Answer

They are highly reactive.

Question 19

Two different isotopes of an element have different

Accepted Answer

number of neutrons

Question 20

Which word means: highly reactive elements belonging to Group 1

Accepted Answer

Alkali metals

Question 21

An element belonging to Group 17 of the periodic table is considered a

Accepted Answer

halogen.

Question 22

An element's atomic number is equal to its number of

Accepted Answer

protons.

Question 23

What word means a unit of measurement in amu that is equal to an element's molar mass

Accepted Answer

average atomic mass

Question 24

The charge of an atom is

Accepted Answer

neutral.

Question 25

What word means equals the number of particles in 1 mol of a substance

Accepted Answer

Avogadro's constant

Question 26

What is the amount of nickel, which has an atomic mass of 58.7 amu, present in 525 g of nickel?

Accepted Answer

8.90 mol

Question 27

An iron atom has an atomic mass of 56. Its atomic number is 26. How many neutrons does it have?

Accepted Answer

30

Question 28

Most elements on the left side of the periodic table are

Accepted Answer

metals.

Question 29

What is the mass number of an element that has 19 protons, 19 electrons, and 20 neutrons?

Accepted Answer

39

Question 30

Magnesium (Mg) is located to the right of sodium (Na) because Mg has

Accepted Answer

none of the other answers are correct

Question 31

Which word means: elements that belong to groups 3-12 and are somewhat reactive

Accepted Answer

transition metals

Question 32

A sodium atom, which has 11 electrons has _____ electron(s) in its third energy level.

Accepted Answer

1

Question 33

How do you know that potassium, an alkali metal, is highly reactive?

Accepted Answer

It has one valence electron.

Question 34

The number of atoms in a sample is _________ related to the mass of the sample.

Accepted Answer

directly

Question 35

Unlike the modern model of the atom, Bohr's model states

Accepted Answer

that electrons move in set paths around the nucleus

Question 36

What is the molar mass of an element with an average atomic mass of 9.012 amu?

Accepted Answer

9.012 grams

Question 37

Atoms of elements belonging to the same group have the same number of

Accepted Answer

valence electrons.

Question 38

Which word means: area of an atom where negatively charged particles are likely to be found

Accepted Answer

orbitals

Question 39

A ratio that can be used to relate the units of an element

Accepted Answer

conversion factor

Test Review

Questions 39

Test Review

Questions 39