Atomic number and mass number (1 d.p.)

Chemistry

In the Calculations involving mass unit, pupils will learn about calculating the relative formula mass of reactants and products in balanced chemical reactions, and the conservation of atoms and mass, as well as the concept of moles (HT only).

In the Patterns in the periodic table unit, pupils learnt how the chemical and physical properties of different elements are indicated by their position on the periodic table and about key groups of elements. 

Atomic structure and the periodic table

the number of electrons in a neutral atom

What does the atomic number of an element indicate?

True or false? The atomic number is equal to the number of electrons in a neutral atom.

the average mass of an atom compared to carbon-12

the total number of protons and neutrons in the nucleus of an atom

If an atom has an atomic number of 6, how many electrons does it have?

mass number includes protons and neutrons

How does the mass number differ from the atomic number?

An atom of an element has a mass number of 23 and an atomic number of 11. How many neutrons does it have?

On the periodic table, what does the number 9 represent for the element Fluorine?

Match the element to its correct atomic number.

Which of the following elements are in group 3?

The element with the atomic number 26 is known for its use in construction due to its strength and low density. What is this element?

Give the name, or symbol, of an element in the first period on the periodic table.

The position of an element in the periodic table is linked to its arrangement of electrons and to its atomic number.

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