Chemistry

What is at the centre of every atom

• Electrons

• Nucleus

• Ions

• Molecules

The positively charged particles of the atom are the...

• Neutrons

• Electrons

• Protons

• Nucleus

How do you work out the number of neutrons in an atom?

Negatively charged particles are called....?

Draw a Bohr Diagram of the element Boron (5 protons, 6 neutrons, 5 electrons)

How many electrons can fit in the first, second and third shell of an atom?

• 2, 8, 8

• 3, 4, 7

• 2, 8, 18

• 8, 8, 18

What does it mean when the number of electrons and protons are the same?

• There is a positive charge

• There is a negative charge

• There is no overall electric charge

• There atom is unstable

How many valence electrons does Chlorine have?

Will it lose or gain electrons?

When an atom gains or loses an electron it becomes an...

If Aluminium loses its three valence electrons, it will become...

• unstable

• neutrally charged

• negatively charged

• positively charged