Question 12

Question

63
Cu
29
In the element above the mass number is and the atomic number is .

Blank 1:
Blank 2:

Question 13
Match each element to its correct group.

Column A
1.
Silver (Ag):
Silver (Ag)
2.
Barium (Ba):
Barium (Ba)
3.
Iodine (I):
Iodine (I)
4.
Argon (Ar):
Argon (Ar)
5.
Potassium (K):
Potassium (K)
Column B
a.Transition Metal
b.Noble Gas
c.Halogen
d.Alkaline Earth Metal
e.Alkali Metal
Question 14
Match the missing coefficient to the correct number of molecules so that the equation adheres to the conservation of mass.

(X)N2 + (Y)H2 → (Z)NH3

Column A
1.
X:
X
2.
Y:
Y
3.
Z:
Z
Column B
a.3
b.2
c.1
Question 15
Classify each change listed below as either a chemical or physical change in matter.

Column A
1.
Liquid water boiling and becoming steam:
Liquid water boiling and becoming steam
2.
Silver metal tarnishing and becoming silver sulfide.:
Silver metal tarnishing and becoming silver sulfide.
3.
Paper burning:
Paper burning
4.
Bending copper wire:
Bending copper wire
5.
Dissloving salt in water:
Dissloving salt in water
6.
Iron rusting to become iron oxide.:
Iron rusting to become iron oxide.

Answer 1

Here are the answers to your questions:

Question 12:

• Blank 1: 63 (mass number)
• Blank 2: 29 (atomic number)

Question 13: Match each element to its correct group.

1. Silver (Ag): a. Transition Metal
2. Barium (Ba): d. Alkaline Earth Metal
3. Iodine (I): c. Halogen
4. Argon (Ar): b. Noble Gas
5. Potassium (K): e. Alkali Metal

Question 14: Match the missing coefficient to the correct number of molecules so that the equation adheres to the conservation of mass.

N2 + H2 → NH3

• Column A

1. X: 1 (for N2)
2. Y: 3 (for H2)
3. Z: 2 (for NH3)

Thus, the balanced equation should be: 1N2 + 3H2 → 2NH3

Question 15: Classify each change listed below as either a chemical or physical change in matter.

1. Liquid water boiling and becoming steam: Physical Change
2. Silver metal tarnishing and becoming silver sulfide: Chemical Change
3. Paper burning: Chemical Change
4. Bending copper wire: Physical Change
5. Dissolving salt in water: Physical Change
6. Iron rusting to become iron oxide: Chemical Change