Which of the following elements is in the compound Hg2Cl2? Select one:
helium
carbon
hydrogen
mercury

Which of the following pairs of elements belong to the same groupa. h and he b. li and bec. c and pb d. ga and ge

Sarah wants to know where in her garden chamomile would grow the best. she thinks chamomile will grow best in the corner of the garden that gets the most sunlight. to test her hypothesis, she decides to plant several groups of chamomile in her garden as an experiment. which of the following variables will sarah need to measure to know which group of plants grew best? a. the location of the plants b. the type of plants c. the height of the plants d. the amount of water she gives the plants

Can someone me with questions 15 to 17 plz.