Elements and atoms Flashcards
Learn about elements and atoms.
1
Q
How many different types of element are there?
A
118.
2
Q
How much of the Earth’s atmosphere does Oxygen take up?
A
Around 21%.
3
Q
What is an element?
A
A substance made of only one type of atom.
4
Q
What is a compound?
A
A substance made of two or more different atoms chemically bonded together.
