Atoms And Elements

Question 1

On which side of the periodic table are the non metals?

Answer 1

The right hand side

Question 2

What is the smallest part of an element that can exist?

Answer 2

Atom

Question 3

Group 1 of the periodic table is called the…

Answer 3

Alkali metals

Question 4

Group 7 in the periodic table is called the…

Answer 4

Halogens

Question 5

Helium, neon, argon and Krypton are found in group 0 and are examples of…

Answer 5

Noble gases

Question 6

Define a molecule

Answer 6

A defined group of non-metal atoms that are chemically bonded

Question 7

Define a compound

Answer 7

Two or more elements chemically bonded in a fixed ratio

Question 8

Potassium phosphate contains potassium, phosphate and what else?

Answer 8

Oxygen

Question 9

Define a mixture

Answer 9

Two or more elements or compounds are present without being chemically bonded together.

Question 10

How does mass change in a chemical reaction?

Answer 10

It doesn’t. Mass of reactants=mass of products.

Question 11

Define a lattice

Answer 11

A regular 3-dimensional arrangement of atoms or ions in a solid

Question 12

Which particles are found in the nucleus?

Answer 12

Protons and neutrons

Question 13

What is the change of an electron?

Answer 13

Negative

Question 14

Which two subatomic particles have the same mass?

Answer 14

Protons and neutrons

Question 15

What is the overall charge of an atom?

Answer 15

0

Question 16

What does the atomic number tell us?

Answer 16

Number of protons. This determines the element.

Question 17

What does the mass number represent?

Answer 17

Number of protons + neutrons

Question 18

What is the charge of a neutron?

Answer 18

0. No charge

Question 19

How many electrons can fit on the inner shell?

Answer 19

2

Question 20

How many electrons can fit on the second outer shell?

Answer 20

8

Question 21

What can electron shells also represent?

Answer 21

Energy levels