Fluorine, chlorine and bromine are elements in Group 7 of the periodic table.Which one of the following statements is true as you go up the group?The attraction between the positively charged nucleus and negatively charged outer electrons decreases as the electrons become further away from the nucleus.The attraction between the positively charged nucleus and negatively charged outer electrons does not change as the electrons remain at the same distance from the nucleus.The attraction between the positively charged nucleus and negatively charged outer electrons increases as the electrons become closer to the nucleus.

Fluorine, chlorine and bromine are all in the same group (group 7) of the periodic table because they __________ in a similar way. What word completes the sentence?

Group 7 elements react by gaining an electron in their outer shell. Why does their reactivity decrease as you go down the group?The outer shell becomes further away from the nucleus, so it is easier to gain an electronThe outer shell becomes closer to the nucleus, so it is harder to gain an electronThe outer shell becomes further away from the nucleus, so it is harder to gain an electronThe outer shell becomes closer to the nucleus, so it is easier to gain an electron2Which halogen is a liquid at room temperature?BromineChlorineIodineFluorine3The halogens exist as:Positive ionsNegative ionsMolecules made of pairs of atoms joined by a covalent bondMolecules made of pairs of atoms joined by an ionic bond4A chemical reaction in which a more reactive element takes the compound away from a less reactive element is known as:CombustionReductionDisplacementOxidation5What will happen when chlorine solution is added to sodium iodide solution?Iodine is producedChlorine gas is producedAn explosionNo reaction6Which of the following is a balanced symbol equation for the reaction of chlorine solution with sodium bromide solution?Cl + NaBr → NaCl + BrCl2 + NaBr → NaCl + Br22Cl + 2NaBr → 2NaCl + 2BrCl2 + 2NaBr → 2NaCl + Br2

As you down the group from lithium to potassium, the outer electron gets further away from the nucleus.Which one of the following statements is true?The attraction between the positively charged nucleus and negatively charged outer electron does not change as you go down the group.The attraction between the positively charged nucleus and negatively charged outer electron is increased as you go down the group.The attraction between the positively charged nucleus and negatively charged outer electron is reduced as you go down the group.I DON'T KNOWSUBMIT ANSWER

Which of the following is NOT a property of the halogens (group 7 elements)?Low densityLow melting pointConduct electricityReactivity decreases down the group

Chlorine has an electronic structure of 2,8,7.For an atom of chlorine to become stable, which one of the following will it need to do?Gain 1 electron to have a full outer shell.Lose 7 electrons to have a full outer shell.