How many different kinds of atoms occur naturally on earth? Why do you think so

How is an endothermic reaction identified in an equation? O A. Heat is included as a reactant in the reaction. O B. The word endothermic is written above the arrow. O c. Heat is included as a product of the reaction. O D.

Calculate the number of grams of hcl that can react with 0.470 g of al (oh) 3.

What is the scientific equesion to make antimatter?

A group or family represents the * blank * on the periodic table a. vertical column b. series c. block d. horizontal row

How many moles of N2 is 224 L of N2?

It would take one light year to travel to the sun? True or false?

A specific, electrically neutral atom of boron has 5 protons, 5 electrons, and 6 neutrons. what is the mass number of this atom of boron? 6 5 11 16

When does hail happen?

For the reaction, calculate how many moles of the product form when 0.012 mol of O2 completely reacts. Assume that there is more than enough of the other reactant. 4Al (s) + 3O2 (g) →2Al2O3 (s) Express your answer using two significant figures.

Nuclei with too many or too few neutrons are?