Stogs GCSE Interleaving Principles M

Where is most of the mass of an atom found?

• In the electron shells

• In the energy levels

• In the nucleus

• In the neutrons

When heated, gas particles:

• Gain more energy

• More faster

• Move further apart from one another

• All the above options are correct

In the plum pudding model of the atom:

• The atom is positively charged and has neutrons and electrons randomly distributed

• Negative electrons orbit the positively charged nucleus

• The atom is a positively charged sphere with negatively charged electrons randomly distributed within

• The positively charged nucleus contains negatively charged electrons randomly distributed within

Atoms are overall neutral because:

• They contain an equal number of protons and electrons - positive electrons balance negative protons

• They contain an equal number of protons and electrons - negative electrons balance positive protons

• They contain neutrons and electrons

• They contain neutrons and protons

The mass number of an atom is:

• The number of nucleons it has

• The number of protons it has

• The number of electrons it has

• The sum of its protons and neutrons

An atom has a mass number of 27 and an atomic number of 13. How many protons, neutrons and electrons does it have?

• 13 protons, 13 electrons and 13 neutrons

• 13 protons, 14 neutrons and 13 electrons

• 13 protons, 14 electrons and 13 neutrons

• 27 protons, 13 neutrons and 27 electrons

Isotopes have:

• The same number of protons and electrons but a different number of neutrons

• The same mass number but a different atomic number

• The same atomic number and the same mass number

• The same number of electrons, but a different number of neutrons and protons

What is the relative atomic mass of gallium? There is 60.11% Ga-69 and 39.89% Ga-71. Give your answer to 1.d.p.

• 70%

• 6978%

• 69.8%

• 6980%

What is the electronic configuration of magnesium?

• 2.6.2

• 2.8.4

• 2.6.4

• 2.8.2

Describe the arrangement of gas particles.

• Random

• Move quickly

• Have no definite volume

• Have no definite shape