0620 All Content

Which of the following is NOT a goal of practical work in scientific subjects?

• Use equipment and materials accurately and safely

• Develop observational and problem-solving skills

• Memorize scientific theories without understanding

• Develop an interest and enjoyment in science

Which of the following is a distinguishing property of solids, liquids, and gases?

• Their color

• Their particle separation, arrangement, and motion

• Their taste

• Their ability to conduct electricity

What is the effect of temperature and pressure on the volume of a gas according to the Core subject content?

• It remains constant

• It decreases

• It increases

• It varies

In the context of diffusion, what does the Core subject content require students to describe and explain?

• The effect of temperature on diffusion

• The effect of pressure on diffusion

• Diffusion in terms of kinetic particle theory

• Diffusion in terms of molecular mass

Describe the differences between elements, compounds, and mixtures.

• Elements are made of one type of atom, compounds are made of two or more types of atoms chemically bonded, and mixtures are combinations of elements or compounds that are not chemically bonded.

• Elements are made of two or more types of atoms chemically bonded, compounds are made of one type of atom, and mixtures are combinations of elements or compounds that are chemically bonded.

• Elements are combinations of elements or compounds that are not chemically bonded, compounds are made of one type of atom, and mixtures are made of two or more types of atoms chemically bonded.

• Elements and compounds are the same, and mixtures are combinations of elements or compounds that are chemically bonded.

Describe the structure of the atom as a central nucleus containing neutrons and protons surrounded by electrons in shells.

• The atom has a central nucleus containing electrons and protons surrounded by neutrons in shells.

• The atom has a central nucleus containing neutrons and protons surrounded by electrons in shells.

• The atom has a central nucleus containing neutrons and electrons surrounded by protons in shells.

• The atom has a central nucleus containing only protons surrounded by neutrons and electrons in shells.

State the relative charges and relative masses of a proton, a neutron, and an electron.

• Proton: +1 charge, 1 mass; Neutron: 0 charge, 1 mass; Electron: -1 charge, 1 mass

• Proton: +1 charge, 1 mass; Neutron: 0 charge, 1 mass; Electron: -1 charge, 1/1840 mass

• Proton: 0 charge, 1 mass; Neutron: +1 charge, 1 mass; Electron: -1 charge, 1/1840 mass

• Proton: +1 charge, 1/1840 mass; Neutron: 0 charge, 1 mass; Electron: -1 charge, 1 mass

Define proton number/atomic number.

• The number of neutrons in the nucleus of an atom.

• The number of electrons in the nucleus of an atom.

• The number of protons in the nucleus of an atom.

• The total number of protons and neutrons in the nucleus of an atom.

Define mass number/nucleon number.

• The number of protons in the nucleus of an atom.

• The number of electrons in the nucleus of an atom.

• The total number of protons and neutrons in the nucleus of an atom.

• The number of neutrons in the nucleus of an atom.

Determine the electronic configuration of elements and their ions with proton number 1 to 20, e.g., 2,8,3.