The atomic number of lithium is 3. How many neutrons does an atom of lithium have if it is represented by the symbol shown below?

7Li

A. 2 neutrons

B. 13 neutrons

C. 4 neutrons

D. 7 neutrons

What is magma? A) The molten of rock-forming substances, gases, and water from the mantle ... B) Liquid rock that reaches the surface. C) Hardened lava on the surface of the earth. D) All of the above.

What is the % nitrogen by weight in 4.039 mol of ammonium sulfide? answer in units of %?

Calculate the final temperature of 35 mL of ethanol initially at 20 ∘C upon absorption of 720 J of heat. (density of ethanol = 0.789 g/mL)

Thursday: Atoms 1) Smallest Unit of matter:
 2) Center of atom:
 3) positive particles in center of atom:
 4) neutral particles in center of atom:
 5) negative particles surrounding the center of the atom:
 6) electrons in the outermost energy level.

Why do elements in the same group have similar properties

If an element has 1 valence electrons, how many dots will be in the elements dot diagram?

What is the temperature of a gas at STP?

What is the numerical meaning of centimeter

You run an experiment to test the effects of temperature on solubility. What would you heat? A.) solvent B.) solute C.) the room B.) the beaker

What happens when a firework is ignited?