When the nucleus of an atom contains a constant number of protons but a variable number of neutrons, the atom is called a (n) ?

1) element

2) isotope

3) valence

4) dalton

Rita was sitting in the garden and reading a book a sudden breeze went by her and she sneezed this reaction is a type of __? action (involuntary, voluntary) In this case Rita's response was controlled by her___? (brain heart or nerves)

When baking soda (sodium bicarbonate or sodium hydrogen carbonate, NaHCO3) is heated, it releases carbon dioxide gas, which is responsible for the rising of cookies, doughnuts, and bread.

Which of the following is ignored when determining the relative mass of atoms?

How many grams in one molecule of c12h22o11?

How do the atomic number and atomic mass of an atom change when a proton is added to its nucleus?

Which statement best describes electrolysis? Electrolysis stores electrons in an aqueous solution. Electrolysis converts chemical energy into electrical energy. Electrolysis separates protons and electrons in an electrolyte.

Why can xenon expand its octet to form compounds but neon can't

What do we call the group of organisms that share the same characteristics?

Oblicz masę azotu w pustym pomieszczeniu o wymiarach podanych na ilustracji gęstość azotu w temperaturze pokojowej wynosi 1,15kg m3 3m, 2,5m, 4m

What is the molarity of a solution that contains 0.400 mol HCl in 9.79 l solution? A. 0.0133 M B. 0.0409 M C. 0.959 M D. 5.67 M