Unit 2 topic 4-6 vocabulary

Question 1

element symbols

Answer 1

one or more letters used to represent the name of a substance

Question 2

chemical group

Answer 2

is the vertical column in the periodic table

Question 3

period

Answer 3

the horizontal row of the periodic table

Question 4

metals

Answer 4

a solid material that is typically hard, shiny and malleable

Question 5

malleable

Answer 5

able to be hammered or pressed out of shape without breaking or cracking

Question 6

ductile

Answer 6

able to be drawn out into a thin wire

Question 7

nonmetals

Answer 7

an element or substance that is not a metal.

Question 8

metalloids

Answer 8

elements with properties between metals and nonmetals.

Question 9

alkali metals

Answer 9

very reactive metals such as lithium, sodium, or potassium

Question 10

alkaline earth metals

Answer 10

the alkaline earth elements react fairly vigorously with some substances, but they are not as reactive as the alkali metals.

Question 11

halogens

Answer 11

They are naturally found in the form of compounds because halogen atoms react vigorously with almost every other element.

Question 12

Noble gases

Answer 12

are unreactive and they are chemically stable. They do not have unpaired electrons.

Question 13

mass number

Answer 13

the total numbers of protons and neutrons in a nucleus

Question 14

molecule

Answer 14

a group of atoms bonded together,

Question 15

binary compounds

Answer 15

compounds made of two elements

Question 16

what are diatomic molecules

Answer 16

molecules made of two atoms of the same element

Question 17

conductivity

Answer 17

the ability of a substance to carry electrical current