3.1 Atoms and elements Flashcards
1
Q
What are atoms?
A
Atoms are the smallest particles that we cannot break down by chemical means. They are mostly empty space. Each consist of a nucleus and a cloud of particles called electrons.
2
Q
What is an element?
A
An element contains only one type of atom.
3
Q
What does the periodic table tell you?
A
Gives the names and symbols of elements
The columns and rows give us clues
4
Q
What are the rows called?
A
The rows are called periods
4
Q
Same column
A
The elements in the same column form families or groups with similar properties.