C1.2 Elements Flashcards
1
Q
What is an element?
A
Is a substance made up of atoms that all have the same number of protons in their nucleus.
2
Q
How many elements are there?
A
About 100
3
Q
What is an isotope?
A
Isotopes are different forms of the same element which have the same number of protons but a different amount of neutrons.
Same Protons
Different No. Nuetrons
4
Q
Elements are written as 1 or 2 letter symbols. Name these?
- O
- H
- K
- Sa
- Fe
- Mg
A
- Oxygen
- Hydrogen
- Potassium
- Sodium
- Iron
- Magnesium
