What type of bond would two sulfur atoms require to form a molecule?

double covalent bond

Explanation:

Ionic bonds are formed by transfer of electrons between metal and non metals.

Covalent bonds are defined as the bonds which are formed by the sharing of electrons between the atoms forming a compound. This bond is usually formed between two non-metals.

As sulfur molecule is formed by combination of two atoms of sulfur which is a non metal, thus form a covalent bond.

These can be single as well as multiple bonds depending on the number of electrons. Single bond is formed by the sharing of two electrons and multiple bonds are formed by the sharing of more than two electrons.

radioactive decay occurs in unstable atomic nuclei – that is, ones that don't have enough binding energy to hold

the nucleus together due to an excess of either protons or neutrons.

1. the question asks the most appropriate, which seems to rule out "all of the above." your choice appears to be the correct one.

2. the protocol described is good for identifying correlation, but not cause and effect. for cause/effect, you need to devise a protocol that will assign the treatment (or not) to groups that have essentially the same "demographics" with respect to all the other variables. your choice regarding control group seems appropriate. random assignment of treatment (choice d) may be appropriate also. (i think you can argue that b and d are just different descriptions of the same method.)

3. d will randomize the birds, but may not guarantee there are 10 in each group. e will do both, so seems the better choice.

comment on question 2

based on the problem statement, it seems clear that confident, attentive drivers are more likely to use daytime running lights. so, the protocol might need to be devised in such a way that the lights would be turned on or off without the driver's knowledge. (an attentive driver will figure it out.) assigning a confident, attentive driver to a group required to drive without running lights might mess with his/her confidence and attentiveness. you don't want your experiment to do that. (nor do you want the experiment to subject a driver to greater risk of accident as a consequence of driving without running lights.) experiments involving human safety are always problematic.