Atoms (J)

Question 0

Electron facts

Answer 0

Moves round nucleus
Negatively charged
Tiny but cover a lot if space
Virtually no mass
Occupy shells around the nucleus

Question 1

The nucleus. Facts

Answer 1

Sits in the middle of atom
Contains protons and neutrons
It has a positive charge because of protons
Almost the whole mass of atom is concentrated in the nucleus
Size - it’s tiny

Question 2

Number of protons equal number of electrons

Answer 2

Protons - positively charged
Neutrons - neutral
Electrons -negatively charged

Question 3

The atomic number tells you

Answer 3

How many protons and electrons there are.
To get neutrons subtract atomic No from mass No
Mass No always the biggest No, it tells you the relative mass of atom. It’s roughly double the atomic No
Mass No -total of protons and neutrons

Question 4

Isotopes - Definition

Answer 4

Isotopes are different atomic forms of the same element, which have the same number of protons but a different number of neutrons and different mass number.
Popular ones are carbon-12 and carbon-14
Carbon 12 = 6 protons, 6 electrons, 6 neutrons
Carbon 14 = 6 protons, 6 electrons, 8 neutrons