Bonding Prequiz #2--Foundations

A compound is held together by

• magnetism.

• gravity.

• physical bonds.

• chemical bonds.

In a metallic bond, the nucleus of one atom is attracted by a nearby atom's

• nucleus.

• negative ion.

• energy structure.

• electrons.

Solid ionic compoiunds have very high melting points because they

• are positively charged.

• contain metallic elements.

• are made of elements that are solid at room temperature.

• contain charged ions that are locked tightly together.

The forces that hold different atoms or ions together are

• electric bonds

• chemical bonds

• physical bonds

• nuclear forces

What determines the reactivity of an element?

• Size of its nucleus
• Number of total electrons
• Number of valence electrons
• Number of shells

How do you determine the number of valence electrons an element has?

• Look at its period
• Look at its group
• Look at its atomic number
• Look at its atomic mass

How many valence electrons does lithium have?

• 1
• 3
• 6.9
• 7

How many valence electrons are elements trying to reach in their outer shells?

• 1
• 2
• 5
• 8

This could be the dot diagram of

• Mg
• Cl
• C
• O

This could be the dot diagram of

• Be
• B
• C
• Ne