What forms when a star creates a hot core surrounded by gas and dust?

Liquid nitrogen is used as commercial refrigerator to flash freeze food. liquid nitrogen boils at - 1966C. what is this temperature on kelvin temperature scale

How do scientist use ice to study ancint climates

the characteristic ions present in water solutions of acids are A) oxide ions B) chloride ions C) hydronium ions D) nitride ions

Which of the following values best classifies a bond between 2 atoms as being ionic?

Why did the people of chungungo need to use nets to catch moisture in the air

Which of the following is a measure of randomness in a system? A) entropy. B) kinetic energy. C) potential energy. D) chemical energy.

What substance can be broken down by chemical means? A) ammonia B) aluminum C) antimony D) argon (Castle learning question)

How the law of conservation of mass could be useful for investigating chemical changes

A covalent chemical bond is one in which outer-shell electrons of two atoms are shared so as to satisfactorily fill the outer electron shells of both atoms. protons and neutrons are shared by two atoms so as to satisfy the requirements of both atoms.

To break a chemical bond, energy must be (1) absorbed (2) destroyed (3) produced (4) released