4 Which quantity represents the number of protons in an atom?

(1) atomic number

(2) oxidization number

(3) number of neutrons

(4) number of valence electrons

Which of the following is an example of commensalism? A) Birds feed off the insects that are stirred up from the grasses as cattle move through. B) A polar bear catches a seal for dinner.

A feeling of weightlessness in orbit is called

5. What if the single replacement reaction involves a nonmetal added to a solution?

Uranium-235 has a half-life of 713 million years, while carbon-14 has a half-life of about 5,730 years. Which isotope would be more useful for dating a fossil from Precambrian time?

What aspect of a substance contributes to a high or a low entropy?

Carbon monoxide reacts with oxygen to form carbon dioxide. 2 CO (g) + O2 (g) → 2C02 (8) In a 1.00 L flask, 3.40 atm of CO reacts with 2.60 atm of O2. Assuming that the temperature remains constant, what is the final pressure in the flask? 4.30 atm 2.

The nerves that Branch out from the spinal cord and connect to the body

The term southern oscillation most nearly refers to

Which kelvin temperature is equivalent to 20°C

When a piece of magnesium metal is added to hydrochloric acid, what gas is produced?