I need help with a chemistry assignment

Dec 15th, 2015
Anonymous
Category:
Biology
Price: $5 USD

Question description

1. what type of chemist exclusively studies most carbon compounds?

organic chemist

inorganic chemist

physical chemist

biochemist

2 which of these chemical formulas-KCl,Xe,CO2, or H2- represent both an element and a molecule?

CO2

H2

KCl

Xe

3 a miner finds a small mineral fragment with a volume of 5.74 cm^3 and a mass of 28.7g what is the density of that mineral fragment?

5.00g/cm^3

0.20g/cm^3

5.74g/cm^3

1.64g/cm^3

4 which subatomic particles have the least mass

electrons

atoms

neutrons

protons

5 an atom of magnesium has an atomic number of 12 and a mass number of 24  how many protons plus neutrons are in the nucleus

36

12

48

24

6 in which group of the periodic table do you find alkali metals?

1A

7A

8A

2A

7 which of the following elements is the most electronegative?

oxygen

barium

francium

iron

8 which class of elements will contain both solids and gases at room temperature?

inner transistion metals

metaloids

metals

nonmetals

9 based on its type of chemical bond, which of the following has the highest boiling point?

oxygen

chloromethane

isopropl alcohol

sodium chloride

10  how many electrons are depicted in the electron dot diagram of an electrically neutral nitrogen atom?

five

six

two

eight


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