1-Atomic structure

AQA A-level CGP textbook

Nucleons are known as?

Protons and neutrons

What orbits the core?

electrons

What is the relative charge of proton?

+1

What is the relative charge of neutron?

0

What is the relative charge of electron?

-1

What is the relative mass of a proton?

1

What is the relative mass of a neutron?

0

What is the relative mass of a electron?

0.0005

What is the symbol for proton number?

Z, and its the number of protons in the nucleus

What defines the element?

Proton number because no two elements can have the same proton number

What is a neutral atom?

Atom with equal number of protons and electrons

What is the nucleon number also referred to as?

the mass number, and has the symbol A, tell you how many protons and neutrons are in nucleus.

Why is number of nucleons the atomic relative mass?

Because electrons weigh virtually nothing

Definition of an isotope

atoms with he same number of protons but different number of neutrons.

What doe number of neutrons affect?

The stability of the nucleus

What do unstable nuclei do?

Become radioactive and decay over time into different nuclei that are more stable

What are all living things made of?

The same percentage of radioactive carbon-14 taken in from the atmosphere

What happens when living things die?

amount of carbon -14 inside them decreases over time as it decays to stable elements.

What can we use to find age of dead organic matter?

Isotopic data( amount of each isotope present) to find percentage of radioactive carbon-14 left in the object.

What is Specific charge?

charge(Coulombs)/mass(kg)