Question

select the true statements.
a chemical bond forms when electrons of one atom are attracted to electrons of another atom.
a chlorine atom has seven valence electrons.
valence electrons can be shared between atoms or transferred from one atom to the other.
atoms combine by forming metallic, covalent, or ionic bonds.

Explanation:

• Statement 1: Chemical bonds form due to the attraction between the nucleus of one atom and the electrons of another (not electron - electron attraction, so this statement is false, but if we assume a misstatement in the question's context and focus on the other true ones or re - evaluate: actually, the correct attraction is between the positive nucleus of one atom and the negative electrons of another. However, among the given, the other statements are true. Wait, no—let's re - check each:
• Statement 2: Chlorine (Cl) is in group 17, so it has 7 valence electrons. This is true.
• Statement 3: In covalent bonds, valence electrons are shared; in ionic bonds, they are transferred. So this is true.
• Statement 4: Atoms combine via metallic (in metals), covalent (non - metals sharing), or ionic (metal - non - metal transfer) bonds. This is true. The first statement is incorrect as electrons repel each other, and bonds form due to nucleus - electron attraction. But if the question's marked ones are considered (the checkmarks), but we need to select true statements. Wait, maybe the first statement was mis - worded, but the other three (2,3,4) are true. But let's go by the options:
• A chlorine atom has seven valence electrons (true, group 17 has 7 valence electrons).
• Valence electrons can be shared (covalent) or transferred (ionic) between atoms (true).
• Atoms combine by metallic, covalent, or ionic bonds (true, these are the three main types of chemical bonds). The first statement is false (electrons repel, bonds form from nucleus - electron attraction). So the true statements are the ones about Cl's valence electrons, valence electron behavior, and bond types.

Answer:

B. A chlorine atom has seven valence electrons, C. Valence electrons can be shared between atoms or transferred from one atom to the other, D. Atoms combine by forming metallic, covalent, or ionic bonds (assuming the options are labeled A - D with A being the first, B the second, etc.)