Fill in the blanks. a. 81Br- has neutrons protons electrons b. 63Cu2 has neutrons protons electrons c. 18O2- has neutrons protons electrons d. 14C has neutrons protons electrons

Answer in explanation

Explanation:

To answer the question, we know that the atomic mass is the sum of the number of protons and neutrons. The number of protons equals the number of electrons in an electrically neutral atom. For positively charged ion, there is loss of electron, we subtract the charge from the number of protons. For negatively ion, there is a gain of electron, we add the charge to the number of protons

A 81Br- has gained one electron

P = 35

N = 81 - 35 = 46

E = 35 + 1 = 36

B. 63Cu2+ has lost 2 electrons

P = 29

N = 63 - 29 = 33

E = 63 - 2 = 61

C. 18O2- has gained 2 electrons

P= 8

N = 18 - 8 = 10

E = 8 + 2 = 10

D. 14C is electrically neutral P = E

P = 6

N = 14 - 6 = 8

E = 6

not clear

answer: option (a) is the correct answer.

explanation:

the measurement of hydrogen ions in a solution is known as ph.

if ph of a solution is less than 7 then the solution is acidic. if ph of a solution is greater than 7 then the solution is basic.

when the ph of a solution equals 7, then the solution is considered as neutral.

the ph of pure water is 7, therefore, it means that concentration of hydronium ions equals that of hydroxide ions.