Question

question 33 (1 point)
which of the following statements is true about ions?
o a when an anion forms, more electrons are transferred to it.
o b anions are positively charged ions.
o c cations are common among nonmetals.
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 n-,02-,f3-
o b k+, sr2+,02-
o c na+, mg+, al+
o d rb-, ba2-, p3+

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

Explanation:

Question 33

• Option a: Anions are formed when atoms gain electrons. So, when an anion forms, more electrons are transferred to it. This is correct.
• Option b: Anions are negatively - charged ions (e.g., \(Cl^-\)), while cations are positively - charged ions (e.g., \(Na^+\)). So, this option is incorrect.
• Option c: Cations are formed when atoms lose electrons. Metals (not non - metals) tend to lose electrons to form cations. Non - metals usually gain electrons to form anions. So, this option is incorrect.
• Option d: Charges for ions are written as a plus or minus sign followed by the number (e.g., \(Na^+\), \(O^{2 -}\)). So, this option is incorrect.

• Option a: The correct charges are \(N^{3-}\), \(O^{2 -}\), \(F^-\). So, this option is incorrect.
• Option b: \(K\) (Group 1) forms \(K^+\), \(Sr\) (Group 2) forms \(Sr^{2+}\), and \(O\) (Group 16) forms \(O^{2 -}\). All charges are correct.
• Option c: The correct charges are \(Na^+\), \(Mg^{2+}\), \(Al^{3+}\). So, this option is incorrect.
• Option d: \(Rb\) (Group 1) forms \(Rb^+\), \(Ba\) (Group 2) forms \(Ba^{2+}\), and \(P\) (Group 15) forms \(P^{3-}\). So, this option is incorrect.

• Option a: \(K\) (Group 1) forms \(K^+\) (not \(K^{2-}\)). So, this option is incorrect.
• Option b: \(Ca\) (Group 2) forms \(Ca^{2+}\), \(Al\) (Group 13) forms \(Al^{3+}\), and \(Br\) (Group 17) forms \(Br^-\). All charges are correct.
• Option c: \(Li\) (Group 1) forms \(Li^+\) (not \(Li^-\)), and \(S\) (Group 16) forms \(S^{2-}\) (not \(S^{2+}\)). So, this option is incorrect.
• Option d: \(Rb\) (Group 1) forms \(Rb^+\) (not \(Rb^-\)). So, this option is incorrect.

Answer:

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

Question 34