Subatomic particles Atoms are made up of three types of smaller particles called

Question

Subatomic particles Atoms are made up of three types of smaller particles called subatomic particles. These smaller particles are called protons, neutrons and electrons. Mass of subatomic particles A proton has a mass of 1 unit (or 1.67 times 10^24 grams) A neutron also has a mass of about 1 unit An electron has a mass of about 1/1850 unit Electric charge of subatomic particles A proton has a positive electric charge (+1 unit) A neutron has no electric charge (0) An electron has a negative electric charge (-1 unit) Location in the atom of the subatomic particles The subatomic particles are arranged in a similar way in every atom. The protons are found in the centre (nucleus) of the atom. The neutrons are also found in the nucleus of the atom. The electrons move around the nucleus of the atom. Complete the table below. Subatomic particle Mass Charge Location Proton Electron Neutron

Explanation / Answer

Proton:

Mass = 1.67 x 10-24 g

Charge = +1

Location = Found in the nucleus of the atom

Electron:

Mass = (1.67 x 10-24 g) / 1850 = 9.027 x 10-28 g

Charge = -1

Location = Electrons moves around the nucleus of the atom

Neutron:

Mass = 1.67 x 10-24 g

Charge = 0

Location = Found in the nucleus of the atom

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