The atomic number of an element is always the same as ___

A. The number of electrons

B. The number of protons

C. The number of neutrons

D. The number of protons plus neutrons

A solution contains AgNO3 and Ba (NO3) 2. What substance could be added to the solution to precipitate Ag + ions, but leave Ba2 + ions in solution?

A disaccharide forms when: two monosaccharides join by dehydration synthesis. two starches join by hydrolysis. two starches join by dehydration synthesis. a starch and a monosaccharide join by dehydration synthesis.

Which conclusion was drawn from the results of the gold foil experiment? (1) An atom is electrically neutral. (2) An atom is mostly empty space. (3) The nucleus of an atom is negatively charged.

What makes silver and gold different in atom and element term

You are given two solutions. Solution A is made by dissolving 4.0 g of copper sulfate in 100 mL water. Solution B is made by dissolving 5.0 g of copper sulfate in 150 mL water. Which has a higher concentration, or are they the same?

What is the total number of protons in the nucleus of an atom of potassium-42? (1) 15 (3) 39 (2) 19 (4) 42

What happens to the equilibrium when the pressure is increased? It favors formation of products. It does not change. It favors formation of reactants. It is conserved.

After 2.0s, Isabela. was riding her bicycle at 3.0m/s on a straight path. After 5.0s she was moving 5.4m/s. What was her acceleration?

Becomes caramel. He pushes astick into the bottom of the acole. Then he dipstip apple in the caramel Which of the following actions is achemical change? melting sugar in the pan turning sugar into caramel putting the stick into the apple

Period # for hydrogen