Question

according to the textbook what is the definition of electron dot diagrams. * 1 point
the force that holds cations and anions together
the force that holds atoms or ions together as a unit
a model of an atom in which each dot represents a valence electron
an atom that has a net positive or negative charge

according to the table electron dot diagrams for some group a elements * 1 point
in figure 2 on page 159, an element with an electron dot diagram like the
one shown here should fit into which group?

?

1a
4a
5a
7a

Explanation:

First Sub - Question (Definition of electron dot diagrams)

• The first option describes ionic bond (force between cations and anions), not electron dot diagrams.
• The second option is the definition of a chemical bond, not electron dot diagrams.
• The third option: Electron dot diagrams (Lewis dot structures) are models where dots represent valence electrons of an atom.
• The fourth option defines an ion, not electron dot diagrams.

• Group 1A elements have 1 valence electron.
• Group 4A elements have 4 valence electrons.
• Group 5A elements have 5 valence electrons. Looking at the dot diagram, the number of dots (valence electrons) is 5 (top 2, left 1, right 1, bottom 1).
• Group 7A elements have 7 valence electrons.

Answer:

C. a model of an atom in which each dot represents a valence electron

Second Sub - Question (Group of the element with the given electron dot diagram)