The mass number of an atom is the sum of the atomic number and

the number of ...

672.5 is 60.4% of what number?

The nucleus divides in meiosis I and again in meiosis II true or false

Some people think that hydroelectric and solar power should be used to supply all of the electricity for the Unite States. Which of the following would be a flaw in this plan?

What are the properties of the alkali earth metals

Non-metals form convalent compounds with each other because thwy have similar electronegativity value true or false?

When an F atom becomes an F-ion, the Fatom gains a proton gains an electron loses an electron loses a proton

A gas changes directly to a solid during (1) fusion (3) saponification (2) deposition (4) decomposition

Performing Percent Composition calculations Carbon dioxide (CO2) is a gaseous compound. Calculate the percent composition of this compound, Answer using three significant figures.

A balloon contains 0.15 moles of co2 gas. how many molecules of co2 are in the balloon?

Arrange the steps in order to describe what happens to a gas when it cools. The A particles of gas move slower. B The gas changes to a liquid. C The gas loses thermal energy. D The space between the gas particles decreases.