Question

1. a cation is formed when an atom:

a. gains electrons
b. loses electrons
c. shares electrons
d. splits into two atoms

1. what charge will magnesium form?

a. +1
b. +2
c. -1
d. -2

1. an anion is:

a. a positively charged ion
b. a neutrally charged atom
c. a negatively charged ion
d. a particle with no protons

1. fluorine vs. calcium: which has higher electronegativity?

a. they are equal
b. fluorine
c. calcium
d. neither has electronegativity

1. atomic radius is defined as:

a. the size of the electron cloud
b. the mass of the atom
c. the number of neutrons
d. the charge of the nucleus

1. what is the correct formula for aluminum oxide?

a. alo
b. al₂o₃
c. al₃o₂
d. alo₂

1. name bacl₂.

a. barium chloride
b. barium dichloride
c. barium(ii) chloride
d. barium chlorine

1. what is the charge of oxygen when forming an ion?

a. +1
b. -1
c. +2
d. -2

Explanation:

Question 10

A cation is a positively - charged ion. An atom loses electrons to become positively charged (since electrons are negatively charged, losing them makes the atom have more protons than electrons, resulting in a positive charge). Gaining electrons forms an anion (negative ion), sharing electrons is for covalent bonding, and splitting into two atoms is not related to ion formation.

Magnesium is in group 2 of the periodic table. Atoms in group 2 have 2 valence electrons and tend to lose these 2 electrons to achieve a stable electron configuration. When an atom loses 2 electrons, it has a charge of +2 (because it has 2 more protons than electrons).

An anion is defined as a negatively - charged ion. A positively - charged ion is a cation, a neutrally charged atom is just a neutral atom (not an ion), and a particle with no protons is not an anion (in fact, a particle with no protons is not a typical atomic - related particle as protons are in the nucleus of an atom).

Answer:

B. Loses electrons

Question 11