Lesson Worksheet: Ions Science
In this worksheet, we will practice describing ions, writing symbols for ions, and predicting whether an atom will form a positive or negative ion.
Q1:
What is the correct pairing of the terms and descriptions shown in the boxes below?
- A1C, 2A, 3B
- B1A, 2B, 3C
- C1B, 2A, 3C
- D1B, 2C, 3A
- E1A, 2C, 3B
Q2:
Which of the following ions has a different number of electrons from the others? The table below gives the atomic number for the five elements.
| Element | Carbon | Nitrogen | Oxygen | Fluorine | Sodium |
|---|---|---|---|---|---|
| Atomic Number | 6 | 7 | 8 | 9 | 11 |
- A
- B
- C
- D
- E
Q3:
Fill in the blank: A positive ion is an atom that has .
- Agained a proton from its nucleus
- Bgained one or more electrons
- Clost one or more electrons
- Dlost a proton from its nucleus
- Ean equal number of electrons and protons
Q4:
Atoms are likely to lose or gain electrons to obtain a full outer electron shell, forming ions in the process. What is the maximum number of electrons that can occupy the L energy level?
Q5:
An atom of lithium can lose 1 electron to form one lithium ion. What is the correct symbol notation for this ion?
- A
- B
- C
- D
- E
Q6:
An ion has the symbol notation . How many electrons have been lost or gained to form this ion?
- A2 lost
- B2 gained
- C1 lost
- D1 gained
Q7:
The compound magnesium bromide () contains one magnesium ion and two bromide ions. The compound is electrically neutral. If magnesium forms a ion, what is the charge on a single bromide ion?
Q8:
The electronic configuration for an atom of neon is shown below. Why do atoms of neon not usually form ions?
- ANeon is neither a metal or a nonmetal.
- BThe nucleus of neon atoms contains too many neutrons.
- CAtoms of neon already have a full outer shell.
- DNeon exists as a gas, and gases do not form ions.
- EAtoms of neon lose a proton to form atoms of fluorine instead.
Q9:
The electronic configurations for an atom and its ion are shown below. Is this atom a metal or a nonmetal?
- AMetal
- BNonmetal
Q10:
The energy level diagram below shows the electronic configuration for an atom. How many electrons does the atom need to lose in order to gain a full outer shell?
- A1
- B6
- C2
- D3
- E4
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