atoms elments moleclues and compounds

Question 1

atom

Answer 1

the smallest particle of an element that can exist.

Question 2

element

Answer 2

a pure chemical substance. Each is made of one type of atom. carbon, mercury and hydrogen are examples

Question 3

molecule

Answer 3

the smallest particle of a substance thst can exist. it is composed of two or more atoms.

Question 4

compound

Answer 4

a substance made of atoms from two or more elements.

Question 5

proton

Answer 5

a particle of matter that has a positive electrical charge and forms part of the nuculeas of an atom.

Question 6

neuwtron

Answer 6

a particle of matter that has no electrical charge and forms part of the nuculeas of an atom

Question 7

electron

Answer 7

a particle of matter that has a negitive electrical charge and travels around the nuculeas of an atom.

Question 8

atomic number

Answer 8

number of protons top number in the element box.

Question 9

mass number

Answer 9

number of protons plus neutrons bottom number in the element box.

Question 10

subscipt

Answer 10

tiny number to the right of the element symbol. Tells you how many atoms of that element.

Question 11

chemical symbol

Answer 11

A one or two letter representation of an element.