Test preparation

The structure of an atom determines its placement in the groups and periods of the periodic table.

• The number of protons determines the period, and the number of electron shells determines the group.

• The number of neutrons determines the group, and the number of protons determines the period.

• The number of electron shells determines the period, and the number of valence electrons determines the group.

• The number of protons determines the group, and the number of neutrons determines the period.

A neutral neon atom possesses how many electrons?

• 8

• 10

• 12

• 14

Which of the following shows the correct electron configurations for Hydrogen (H) and Magnesium (Mg)?

• Hydrogen: 1, Magnesium: 2.8.2

• Hydrogen: 2, Magnesium: 2.8.1

• Hydrogen: 1.1, Magnesium: 2.8.1

• Hydrogen: 2, Magnesium: 2.8.2

The number of valence electrons is related to the element’s position on the periodic table in which way?

• Elements in the same group have the same number of valence electrons.

• Elements in the same period have the same number of valence electrons.

• All elements have the same number of valence electrons regardless of position.

• Valence electrons increase randomly across the table.

Which of the following statements best describes the trend in reactivity as you move down Group 1 and Group 17 elements in the periodic table?

• Reactivity increases down Group 1 and decreases down Group 17.

• Reactivity decreases down both Group 1 and Group 17.

• Reactivity increases down both Group 1 and Group 17.

• Reactivity decreases down Group 1 and increases down Group 17.

An ionic bond can form between sodium and chlorine when:

• Sodium transfers an electron to chlorine, resulting in oppositely charged ions that attract each other.

• Sodium and chlorine share electrons equally to form a molecule.

• Chlorine transfers an electron to sodium, resulting in oppositely charged ions that attract each other.

• Sodium and chlorine combine without any electron transfer or sharing.

Using a periodic table, predict the chemical formula for potassium fluoride.

• KF

• K2F

• KF2

• K2F2

Using a periodic table, predict the chemical formula for barium bromide.

• BaBr2

• BaBr

• Ba2Br

• Ba2Br2

Using a periodic table, predict the chemical formula for aluminium sulfide.

• Al2S3

• AlS2

• Al3S2

• AlS3

Hydrogen and chlorine form a covalent bond to create hydrogen chloride by sharing how many pairs of electrons?

• One pair

• Two pairs

• Three pairs

• Four pairs