Question

exam lesson name: chemistry
exam number: 700700rr
exam guidelines
exam instructions
question 1 of 20 :
select the best answer for the question.

1. the measure of the number of atoms in one element that will combine with an atom of another element is

a. atomic number.
b. molecular number.
c. atomic charge.
d. valence.
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Explanation:

To solve this, we analyze each option:

• Option A: Atomic number is the number of protons in an atom's nucleus, not related to combining atoms.
• Option B: There's no standard term "molecular number" for this concept.
• Option C: Atomic charge refers to the electrical charge of an atom (like in ions), not about combining ratios.
• Option D: Valence (or valency) is defined as the measure of the number of atoms of one element that combine with one atom of another element.

Answer:

D. valence.