7.3 A Closer Look At Atoms Flashcards Preview

Year 8 Science Exam Semester 2 > 7.3 A Closer Look At Atoms > Flashcards

Flashcards in 7.3 A Closer Look At Atoms Deck (13):
1

What do atoms make up?

They make up everything

2

What are some physical and chemical properties of atoms?

Physical: size and mass
Chemical: determines atoms interacts with others

3

What are atoms made up of?

Subatomic particles

4

What are the three types of subatomic particles?

Protons, neutrons and electrons

5

Where are protons and neutrons?

In the centre of the nucleus

6

How much lighter are electrons from protons and neutrons?

1800x lighter

7

Why are electrons bound tightly to the nucleus?

Because electrons have a - charge and protons have a + charge. Opposite attract like a magnet

8

What is the total charge of an atom?

0 because there is an equal number of electrons and protons, and neutrons are neutral

9

What do the number of protons determine?

What type of atom it is and what element they belong to

10

What jus the atomic number?

The number of protons in an atom. In the periodic table, elements ordered by the atomic number

11

What is the mass number?

The number or protons and electrons. Often written alongside the chemical symbol

12

How many electrons can be held in each shell?

Inner shell= 2 electrons
Second shell= 8 electrons
Third shell= 18 electrons
Fourth shell = max of 32 electrons

13

What takes up the most space of an atom?

The electron shells