C1.1 Atoms

Question 1

What is an element?

Answer 1

A pure substance containing only one type of atom.

Question 2

What are the the three basic parts of an atom?

Answer 2

Proton,Neutron,Electron

Question 3

Define compound

Answer 3

A substance that contains Two or more elements chemically bonded together.

Question 4

Mixture

Answer 4

A mixture contains different substances that are not chemically joined to each other.

Question 5

What is a chemical formula?

Answer 5

A chemical formula is a notation used by scientists to show the number and type of atoms present in a molecule, using the atomic symbols and numerical subscripts.

Question 6

What are the seven diatomic elements?

Answer 6

hydrogen (H), nitrogen (N), oxygen (O), fluorine (F), chlorine (Cl), bromine (Br), and iodine (I).

Question 7

Why are some elements called diatomic elements?

Answer 7

Because they exist in pairs

Question 8

Balance this equation: H2O > H2 + O2

Answer 8

2H2O > 2H2 + O2

Question 9

What is the chemical symbol for potassium?

Answer 9

K

Question 10

What is the name of the element with the chemical symbol B

Answer 10

Boron

Question 11

What is the chemical symbol for copper?

Answer 11

Cu