An ion has 14 protons and a charge of “+2”. How many electrons does it have? Sel

Question

An ion has 14 protons and a charge of “+2”. How many electrons does it have?

Select one:

a. 12

b. 16

c. 10

d. 14

b. The molecular formula for copper nitrate is Cu(NO3)2. Which of the following correctly describes the number of atoms in this molecule?   

Select one:

a. 1 copper atom; 1 nitrogen atom; 6 oxygen atoms

b. 1 copper atom; 2 nitrogen atoms; 5 oxygen atom

c. 2 copper atoms; 2 nitrogen atoms; 6 oxygen atoms

d. 1 copper atom; 2 nitrogen atoms; 6 oxygen atom

3. Which of the following solutions would have the highest pH?

Select one:

a. 0.1 M NaOH

b. 0.01 M HCl

c. 0.1 M HCl

d. 0.01 M NaOH

Explanation / Answer

1) Answer: (a)

Explanation:

Number of protons equal to number of electrons in the atom, But here the charge is +2 means it lost two electrons from its valency.

Hence the number of electrons = 14 - 2 = 12

2) Answer: (d)

Explanation:

Cu(NO3)2

Cu atoms = 1

N atoms = 2

O atoms = 6

3) Answer: (a)

Explanation:

Generally the strong bases PH above the 7. The Acids are having the lower PH value. The value are less than 7.

In the question two types of NaOH concentrations given. If the concentration is more its corresponding Hydroxide ions (-OH) are more and the PH is also more.

Related Questions

Navigate

• Browse (All)
• Browse A
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.