Atoms And The Periodic Table-Brooklyn Griffith

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 is found in the nucleus

Question 3

Neutron

Answer 3

A subatomic particle that has no charge and is located in the nucleus

Question 4

Electron

Answer 4

Subatomic particle that has a negative charge located outside of the nucleus

Question 5

Orbital

Answer 5

Region in atom where there is a high probability of finding electrons

Question 6

Valence electron

Answer 6

Electron found in the outer most shell of an atom and determines chemical properties

Question 7

Periodic law

Answer 7

Law that states that a repeating chemical and physical properties of elements change periodically with the atomic numbers of the elements

Question 8

Period

Answer 8

A horizontal row of elements in the periodic table

Question 9

Group

Answer 9

A vertical column of elements in the periodic table

Question 10

Ion

Answer 10

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

Question 11

Atomic number

Answer 11

The number of protons in the nucleus of an atom

Question 12

Mass number

Answer 12

The sum of the numbers of protons and neutrons in the nucleus of an atom

Question 13

Isotope

Answer 13

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

Question 14

Atomic mass unit (amu)

Answer 14

A unit of mass that describes the mass of an atom or molecule

Question 15

Average atomic mass

Answer 15

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

Question 16

Metal

Answer 16

An element that is shiny and conducts heat and electricity great

Question 17

Nonmetal

Answer 17

An element that conducts heat and electricity poorly

Question 18

Semiconductor

Answer 18

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

Question 19

Alkali metal

Answer 19

One of the elements of group 1 of the periodic table

Question 20

Alkaline-earth metal

Answer 20

One of the elements of group 2 of the periodic table

Question 21

Transition metal

Answer 21

One of the elements of group 2 of the periodic table

Question 22

Halogen

Answer 22

One of the elements of group 17 of the periodic table

Question 23

Noble gas

Answer 23

An unreavtive element of group 18 of the periodic table

Question 24

Mole

Answer 24

The SI base unit used to measure the amount of a substance whose number of particles is the same as the number of atoms of carbon in 12g or carbon 12

Question 25

Avoagdro’s constant

Answer 25

Equals 6.022*10^23/mol; the number of particles in 1 mol

Question 26

Molar mass

Answer 26

The mass in grams of 1 mol of a substance

Question 27

Conversion factor

Answer 27

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