An element is identified by:

A. Its number of protons

B. the atomic mass

C. The type of charge

D. its number of isotopes

Nitric acid can be formed in two steps from the atmospheric gases nitrogen and oxygen, plus hydrogen prepared by reforming natural gas.

Which of the samples most likely had the lowest solubility?

Explain why Group 1 elements tend to form 1 + ions and Group 7 elements tend to form 1 - ions. a) the number of electrons of the ions will be even numbers b) the electron configuration of the ions will match that of a halogen c) the electron

How and when did scientists discover cells

Why does continental crust rise above oceanic crust when the two meet

How many grams of AgNO3 are needed to prepare a 0.25 m solution in 500 grams of water? Question 2 options: 125 g 0.125g 21.25 g 170g

What is the name of the chart that organizes elements in order of chemical properties?

In a convection current, why does cool air take the place of warmer air? A. Cool air is less dense than warm air, so it sinks to take the place of rising warm air. B. Cool air is denser than warm air, so it sinks to take the place of rising warm air.

Where would the gravitational attraction between the earth and moon be the weakest

According to the all-or-none principle, what would happen if a cell were depolarized twice the normal amount needed to produce an action potential?