Year 10 Core Science - Chemistry

What elements does this atomic orbital diagram represent?

• Silicon

• Magnesium

• Oxygen

• Chloride

What is the subshell notation for Nitrogen?

• 1s2 2s2 2p6

• 1s2 2s2 2p3

• 1s2 2s2 2p6 3s3

• 1s2 2s2 2p6 3s2

In the following diagram what does the black circle represent, and what would be contained in it?

• Electron, protons & neutrons

• Proton, electrons & neutrons

• Nucleus, protons & neutrons

• Nucleus, protons & electrons

How are the particles of H2O behaving in ice?

• Loosely packed together, maximum vibrations

• Closely packed together, maximum vibrations

• Loosely packed together, minimal vibrations

• Closely packed together, minimal vibrations

What is the chemical symbol for Sodium?

• Na

• Sd

• So

• Sm

What is the atomic number and mass number for Oxygen?

• 16, 8

• 8, 16

• 2, 8, 6

• 8, 8

What is the definition of mass number?

• The number of protons plus the number of electrons

• The number of protons

• The number of protons plus the number of neutrons

• The number of electrons

Do the number of protons always equal the number of electrons in an atom?

• Yes

• Yes, but only when the atom reacts with another atom

• No, only true when the atom reacts with another atom

• No, only true when the atom is in elemental form

Which of these 2 diagrams represents a cation?

• Right

• Left

• Both

• Neither

Do these 2 diagrams represent the same atom?

• No, the number of electrons is different

• Yes, the number of protons is the same

• No, the number of protons is different

• Yes, the number of electrons is the same