At -20 degree C, the matter exists as a gas. How many times the matter will change its state when the gas is heated from -100C to 1200C?

the answer is 1260

you spend 7 hours in school for 1 school day with 5 school days in 1 school week with 36 school weeks in a school year.

7*5*36= 1260 it's all about multiplying

oxygen, selenium, tellurium, and polonium.

they're all from the same group as sulfur (group 16).

1. a)c-14 has two more protons

2. d)they have different numbers of protons, neutrons, and valence electrons; they are all gases at room temperature.

3. c) iron and nickel.