The Periodic Table (not so rare)

Question 1

Actinide

Answer 1

Fifteen metallic elements with the atomic numbers 89-103

Question 2

Alkali metal

Answer 2

Highly reactive elements, shiny, soft, and silvery

Question 3

Alkaline earth metal

Answer 3

Moderately reactive natural elements, shiny and silvery white

Question 4

Atomic mass

Answer 4

Total mass of protons, neutrons and electrons in an atom

Question 5

Atomic number

Answer 5

Number of protons in the nucleus of an atom

Question 6

Chemical symbol

Answer 6

One- or two- letter code for a chemical element

Question 7

Halogen

Answer 7

Series of very reactive nonmetals

Question 8

Isotope

Answer 8

Variant of chemical element; protons are the same, but neutrons vary

Question 9

Lanthanide

Answer 9

Fifteen metallic elements with the atomic numbers 57-71

Question 10

Mass number

Answer 10

total number of protons and neutrons in a nucleus

Question 11

Metal

Answer 11

Element that is a good conductor of electricity and heat

Question 12

Metalloid

Answer 12

Elements that are a mix between metals and nonmetals

Question 13

Noble gas

Answer 13

Six oderless, colorless gases with low reactivity

Question 14

Nonmetal

Answer 14

Group of elements that are poor conductors of heat and electricity; dule and brittle

Question 15

Periodic table

Answer 15

Display of the chemical elements

Question 16

Post- transition metal

Answer 16

Metals to the right of transition elements on the periodic table

Question 17

Rare earth element

Answer 17

Seventeen elements; lanthanides plus scandium and yttrium

Question 18

Transition metal

Answer 18

Familiar metals such as iron, nickel, copper, and gold