Section 1.4 Atoms

Question 1

What are elements?

Answer 1

Substances made with only one type of atom

Question 2

How are the elements presented on the periodic table?

Answer 2

With symbols. Example: Na, Cl, Ag

Question 3

What do the columns in the periodic table represent?

Answer 3

Groups

Question 4

What does the ‘staircase in the periodic table represent?

Answer 4

The line dividing the metals (left) with non-metals (right)

Question 5

What are compounds?

Answer 5

Substance made with different types of atoms

Question 6

What does an atom consist of?

Answer 6

• Nucleus containing positive protons and neutral (no charge) neutrons in the centre
• Negative electrons orbiting around the nucleus at a fixed distance (in energy shells)