Which of the following is a non metal that remains liquid at room temperature? a. phosphorous b. bromine c. chlorine d. helium chlorophyll is a naturally occurring chelate compound in which central metal is a. copper b. magnesium c. iron d. calcium

1st answer B.Bromine

2nd answer B. magnesium

Explanation:

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Which of the following is a non metal that remains liquid at room temperature? "OPTION B"

Chlorophyll is a naturally occurring chelate compound in which central metal is "OPTION B"

because u need two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei to form isotopes.

so since they all have the same shape? i mean maybe because m& m and reeses are both chocolates

the answer is:  

line graphs show patterns in data with variables that change over time; whereas, circle graphs show data as parts out of a whole (such as out of 100%).