Chemistry - Atomic Structure - Triple

What is the relative charge of a neutron?

What is the relative mass of a proton?

What is the relative mass of an electron?

Which of these particles are found in the nucleus?

• Proton

• Electron

• Neutron

Atoms have a neutral charge overall because they have an equal number of positive protons and negative _________.

How many protons are found in magnesium?

How many neutrons are found in magnesium?

Calculate the number of protons, electrons and neutrons in boron.

• Protons = 5, Electrons = 5, Neutrons = 11

• Protons = 11, Electrons = 11, Neutrons = 5

• Protons = 5, Electrons = 5, Neutrons = 6

• Protons = 5, Electrons = 11, Neutrons = 16

An version of an element with the same number of protons and electrons, but a different number of neutrons is called an _______.

• isotope

• ion

• atom

• nucleus

Why was Mendeleev's version of the periodic table different to previous versions?

• He grouped the elements with similar properties.

• He left gaps for undiscovered elements.

• He arranged the elements in order of atomic mass.