Chemistry topic test

One of the particles inside the atom is very much lighter than the others. It is the

• electron

• neutron

• nucleus

• proton

The nucleus of the atom contains

• only neutrons

• only protons

• electrons and neutrons

• neutrons and protons

The columns of the periodic table are called

• series

• families

• groups

• isotopes

The elements helium and neon are both classified as

• alkali metals

• alkaline earth metals

• halogens

• inert/noble gases

In the periodic table, elements with similar properties can be found in

• every second row

• every fourth column

• the same group

• the same period

The elements in the periodic table are organised on the basis of their

• atomic number

• boiling point

• melting point

• mass number

Refer to the diagram. Which of the following are atoms of the same element

• U and Y

• U and X

• X and Y

• U and V

The sodium atom has an atomic number of 11 and loses an electron to form the sodium ion Na+. How many electrons does sodium have in its OUTER shell when it becomes and ion

• 11

• 10

• 1

• 8

The atoms that form covalent bonds are formed by:

• the sharing of electrons

• the sharing of protons

• the sharing of neutrons

• the attraction of ions

The maximum number of electrons in the 3rd shell of an atom is:

• 2

• 8

• 10

• 12