Y9 Chemistry Quiz 1

Figure 5 shows the changes of state for gallium and the arrangement of particles in liquid gallium. Which description has the correct arrangement of the particles in each of these physical states.

• Solid gallium: particles are closely packed in a regular arrangement. Gaseous gallium: particles are far apart and randomly arranged.

• Solid gallium: particles are far apart and randomly arranged. Gaseous gallium: particles are closely packed in a regular arrangement.

• Solid gallium: particles are randomly arranged and far apart. Gaseous gallium: particles are closely packed in a regular arrangement.

• Solid gallium: particles are loosely packed in a regular arrangement. Gaseous gallium: particles are closely packed in a regular arrangement.

Give the name of the change of state labelled Y in Figure 5.

• Boiling (or vaporization/evaporation)

• Melting

• Condensation

• Freezing

In Figure 1, the letters A, E, G, J, X and Z show the positions of six elements in the periodic table. These letters are not the symbols of the atoms of these elements. Using the letters A, E, G, J, X and Z, give the letters of the two elements that are non-metals.

• G, X

• A, G

• J, Z

• A, J

Using the letters A, E, G, J, X and Z, give the letters of two elements in period 2.

• E, G

• A, J

• X, Z

• A, E

In Figure 1, the letters A, E, G, J, X and Z show the positions of six elements in the periodic table. These letters are not the symbols of the atoms of these elements. Using the letters A, E, G, J, X and Z, give the letter of an element that normally forms an ion with a charge of +1.

• A

• E

• G

• J

The particles in atoms are electrons, neutrons and protons. The mass of an electron is

• greater than the mass of a neutron

• the same as the mass of a proton

• smaller than the mass of a proton

• the same as the mass of a neutron

The atomic number of oxygen is 8 and its mass number is 17. The nucleus of this atom contains:

• 8 protons and 9 neutrons

• 8 protons and 8 neutrons

• 9 protons and 8 neutrons

• 8 protons and 17 neutrons

Sulfur and oxygen are both in group 6 of the periodic table. Which of the following best explains why they are both in group 6?

• They both have six electrons in their outermost shell.

• They both have six protons in their nucleus.

• They both have six neutrons in their nucleus.

• They both have six energy levels.

The arrangement of 15 electrons in a phosphorus atom is:

• 2 electrons in the first shell, 8 in the second, and 5 in the third shell

• 2 electrons in the first shell, 7 in the second, and 6 in the third shell

• 2 electrons in the first shell, 6 in the second, and 7 in the third shell

• 2 electrons in the first shell, 8 in the second, and 4 in the third shell

A definition of isotopes is:

• They have the same number of protons but different numbers of neutrons.

• They have different numbers of protons and neutrons.

• They have the same number of neutrons but different numbers of protons.

• They have different numbers of electrons only.