Chemical Elements (Section 1)

Question 0

Matter is?

Answer 0

Anything that takes up space and has mass

Question 1

Organisms are composed of?

Answer 1

Matter

Question 2

Mass is?

Answer 2

The amount of matter in an object

Question 3

An element is?

Answer 3

A pure substance that cannot be broken down by chemical reactions.

Question 4

What is a compound?

Answer 4

2+ elements combined in a fixed ratio

Question 5

What 4 elements make up 96% of living matter?

Answer 5

Carbon, oxygen, hydrogen, and nitrogen

Question 6

What prevents a goiter?

Answer 6

Iodized salt

Question 7

Elements are made of how many typesnof atoms?

Answer 7

One type

Question 8

What is an atom?

Answer 8

Smallest unit of matter that retains properties of an element

Question 9

A neutron has?

Answer 9

A nucleus, no charge, and it equalls 1 dalton

Question 10

A proton has?

Answer 10

Nuclues, each has a positive charge, equalls 1 dalton, And it charges the nucleus

Question 11

Electrons do what?

Answer 11

Move at the speed of light, form a cloud around the nucleus, each has a negative charge

Question 12

What is a dalton?

Answer 12

A unit of measurment. NOTE: 1 AMU= 1 dalton

Question 13

When did John Dalton develope the atomic theory?

Answer 13

1800

Question 14

Atomic weight is also the?

Answer 14

Atomic mass

Question 15

Different elements have different numbers of?

Answer 15

Subatomic Particles

Question 16

An element always has a different number of?

Answer 16

Protons

Question 17

Atomic number is the —- in neutral atoms?

Answer 17

Protons

Question 19

Subscripts are numbers above or below the symbol?

Answer 19

Below

Question 20

Mass number minus the atomic number equalls?

Answer 20

The number of neutrons

Question 21

Mass number is also called?

Answer 21

Atomic weight

Question 22

An atom is neutral unless?

Answer 22

Noted otherwise