Question 4
Use the words in the box to complete the paragraph about the Periodic Table. Some words may be used more than once.
Words: elements; atomic number; symbol; nucleus; mass number; nucleons; protons; neutrons; electrons.
There are over 100 different ____ that occur naturally on Earth. They are organised in some way in the Periodic Table. If you look closely at the Periodic Table, you will see that all the elements are written in a similar way. They each have an atomic ____ and a name. Each element has an ____, which shows how many protons are in the ____ of that atom. Each element also has a ____, which shows how many ____ and ____ are in the nucleus of that atom. Together, protons and neutrons are known as ____. An atom is electrically balanced. This means that it has an equal number of ____ (positively charged) and ____ (negatively charged).
Words: elements; atomic number; symbol; nucleus; mass number; nucleons; protons; neutrons; electrons.
There are over 100 different ____ that occur naturally on Earth. They are organised in some way in the Periodic Table. If you look closely at the Periodic Table, you will see that all the elements are written in a similar way. They each have an atomic ____ and a name. Each element has an ____, which shows how many protons are in the ____ of that atom. Each element also has a ____, which shows how many ____ and ____ are in the nucleus of that atom. Together, protons and neutrons are known as ____. An atom is electrically balanced. This means that it has an equal number of ____ (positively charged) and ____ (negatively charged).
