Chemistry Study Guide

Draw a model of an atom. Label the following in the model: nucleus, electron levels, protons, neutrons, electrons. Be sure to include the charges of the subatomic particles.

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Explain the conditions of a neutral atom in terms of protons and electrons.

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Explain the conditions of a positive ion and a negative ion in terms of protons and electrons.

• A positive ion has more protons than electrons, and a negative ion has more electrons than protons.

• A positive ion has more electrons than protons, and a negative ion has more protons than electrons.

• Both positive and negative ions have equal numbers of protons and electrons.

• A positive ion has more neutrons than protons, and a negative ion has more protons than neutrons.

Which of the following lists the steps for naming an ionic compound?

• Identify the cation and anion, name the cation first, then the anion.

• Identify the anion and cation, name the anion first, then the cation.

• Name the elements in alphabetical order.

• Name the elements in reverse alphabetical order.

What is the first step for writing an ionic formula?

• Identify the cation and its charge

• Identify the anion and its charge

• Balance the charges

• Write the formula

Which of the following lists the characteristics of an ionic compound?

• High melting and boiling points, conducts electricity when molten or dissolved in water

• Low melting and boiling points, does not conduct electricity

• Soft and malleable, conducts electricity in solid state

• Low density, does not conduct electricity in any state

Complete the following table:

• 18

• 18

• 0

Which of the following is the correct formula for potassium bromide?

• KBr

• BeCl2

• Al2O3

• NaCl

What is the name for KBr?

• Potassium Bromide

• Calcium Fluoride

• Aluminum Sulfide

• Sodium Chloride

What number on the periodic table describes the number of protons for an atom?

• Atomic number

• Mass number

• Isotopic number

• Neutron number