Question

question 33 (1 point)
which of the following statements is true about ions?
o a anions are positively charged ions.
o b cations are common among nonmetals.
o c when an anion forms, more electrons are transferred to it.
o d charges for ions are always written as numbers followed by a plus or minus sign.

question 34 (1 point)
in which of the following sets are the charges given correctly for all the ions?
o a k, sr2,02-
o b na, mg, al*
o c rb, ba2, p3+
o d n,02,f3-

question 35 (1 point)
in which of the following groups of ions are the charges all shown correctly?
o a ca2, al3, br-
o b na*, i, rb-
o c k2, f, mg2+
o d li,02, s2+

Explanation:

Question 33

• Anions are negatively charged ions (so option a is wrong).
• Cations are common among metals (so option b is wrong).
• When an anion forms, it gains electrons (so option c is correct).
• Charges for ions are written as a plus or minus sign followed by numbers for some common ions (e.g., \(O^{2 -}\)), so option d is wrong.

• Option a: \(K^+\) (Group 1, +1 charge), \(Sr^{2+}\) (Group 2, +2 charge), \(O^{2 -}\) (Group 16, - 2 charge) - correct.
• Option b: \(Mg\) should be \(Mg^{2+}\), \(Al\) should be \(Al^{3+}\) - wrong.
• Option c: \(Rb\) should be \(Rb^{+}\), \(Ba\) should be \(Ba^{2+}\), \(P\) should be \(P^{3 -}\) - wrong.
• Option d: \(N\) should be \(N^{3 -}\), \(F\) should be \(F^{-}\) - wrong.

• Option a: \(Ca^{2+}\) (Group 2, +2 charge), \(Al^{3+}\) (Group 13, +3 charge), \(Br^{-}\) (Group 17, -1 charge) - correct.
• Option b: \(Rb\) should be \(Rb^{+}\) - wrong.
• Option c: \(K\) should be \(K^{+}\) - wrong.
• Option d: \(Li\) should be \(Li^{+}\), \(S\) should be \(S^{2 -}\) - wrong.

Answer:

c. When an anion forms, more electrons are transferred to it.

Question 34