Question

sodium and chloride atoms combine readily because they both lose electrons.
a true
b false

question 4
dna and rna are nucleic acids.
a true
b false

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Explanation:

First Question (Sodium and chloride atoms combine...)

Sodium (Na) is a metal that loses an electron to form \( Na^+ \), while chlorine (Cl, note: "chloride" is the ion, the atom is chlorine) gains an electron to form \( Cl^- \). They combine because of electron transfer (Na loses, Cl gains), not both losing. So the statement is false.

Nucleic acids are biomolecules, and DNA (deoxyribonucleic acid) and RNA (ribonucleic acid) are the two main types of nucleic acids. So the statement is true.

Answer:

B. False

Second Question (DNA and RNA are nucleic acids)