U4HW1: Bonding and energy

Match the following

Groups:

(a) Endothermic

,

(b) Exothermic

• A + B --> AB + energy

• AB + Energy --> A + B

• More stable product.

• Bonds formed

• Energy released

• less stable product

• Bonds broken

• energy absorbed

Given the balanced equation representing a reaction

H₂(g) + Cl₂(g) → 2HCl(g) + energy

• Energy is absorbed as bonds are in HCl are formed.

• Energy is absorbed as bonds are in HCl are broken.

• Energy is released as bonds are in HCl are formed.

• Energy is released as bonds are in HCl are broken.

Chemical bonding is the simultaneous attraction of two nuclei to

• Protons

• Neutrons

• Electrons

• Atomic number

Label with the appropriate name.

a

b

c

Atomic Mass

Electron Configuration

Protons

How many electrons are being shared between nitrogen?

• 3

• 6

• 8

• 10

The electron configuration of phosphorous is ______________.

A covalent bond ​ (a)   electrons. It is between 2 ​ (b)   . In ionic bonds, electrons are ​ (c)   from the ​ (d)   to the ​ (e)   .

• shares
• nonmetals.
• transferred
• metal
• nonmetal
• mobile

The greater the energy released during the formation of a bond, the greater the stability. Explain why.

Answer explanation

The more energy it takes to break a bond, the stronger the bond/attractive forces are.

An atom with equal numbers of protons and electrons is called

• positive ion

• negative ion

• neutral atom

• isotope

An atom with more electrons than protons is called

• isotope

• atom

• cation

• anion