Chapter 4 Vocabulary

Question 1

Nucleus

Answer 1

An atoms central region which is made up of protons and neutrons

Question 2

Proton

Answer 2

A subatomic particle that has a positive charge and that is found in the nucleus of an atom

Question 3

Neutron

Answer 3

A subatomic particle that has no charge and that is found in the nucleus of an atom

Question 4

Electron

Answer 4

A subatomic particle that has a negative charge

Question 5

Orbital

Answer 5

A region in atom where there is a high probability of finding electrons

Question 6

Period

Answer 6

A horizontal row of elements in the periodic table

Question 7

Group

Answer 7

A vertical column of elements in the periodic table

Question 8

Ion

Answer 8

An atom or a group if atoms that has lost or gained one or more electrons and has a negative or positive charge

Question 9

Atomic number

Answer 9

The number of protons in the nucleus of an atom

Question 10

Mass number

Answer 10

The sum of the number of proton and neutron in the nucleus of an atom

Question 11

Isotope

Answer 11

An atom that has the same number of protons as the other atoms of the same element but it has a different number of neutrons

Question 12

Atomic mass unit

Answer 12

A unit that describes the mass of an atom or molecule

Question 13

Average atomic unit

Answer 13

The weighed average of the masses of all naturally occurring isotopes of an element

Question 14

Metal

Answer 14

An element that is shinny and conducts heat and electricity well

Question 15

Nonmetal

Answer 15

An element that conducts heat and electricity poorly

Question 16

Semiconductor

Answer 16

An element or compound that conducts electric current better than an insulator but not as well as a conductor does

Question 17

Alkali metal

Answer 17

On of the elements of group one of the periodic table

Question 18

Alkaline earth metal

Answer 18

One of the elements of group two of the periodic table

Question 19

Transition metal

Answer 19

One of the elements of groups 3-12 of periodic table

Question 20

Noble gas

Answer 20

An nonreactive element of group 18 of the periodic table

Question 21

Mole

Answer 21

The SI unit used to measure the amount of a substance whose number of particles is the same as the number of atoms

Question 22

Avogadro’s constant

Answer 22

The number of particles 1 mole

Question 23

Molar mass

Answer 23

The mass in grams of 1 mol of an substance

Question 24

Conversion factor

Answer 24

A ratio that is derived from the equality of two different units and that can be used to converted from one unit to another