Which of these elements is an alkaline earth metals?

a. hafnium (Hf)

b. radon (Rn)

c. silicon (Si)

d. sulfur (S)

Q: If the p53 gene is damaged, what can occur? A: Tumor growth B: Lack of oxygen to the brain C: No antibodies formed D: Buildup of lactose (this is online life science. I picked chemistry because that was the closet thing lol

2C (s) + 2H2 (g) → C2H4 (g) : ΔH = + 52.4 kJ/mol Which statement about this reaction is correct?

What is the mass of 3.50*10^26 atoms of copper

How does distance affect the strength of the magnetic force?

Why is Avogadro's number referred to as a mole? If you could change this terminology, what would you change it to and why?

For the baeyer-villiger oxidation of cyclohexyl methyl ketone

What will happen if the density of an object is less than the density of water?

Which cannot be separated into simpler substances? compound element solution mixture

What jobs involve chesmistry

Think about a neutral magnesium atom. Then think of a magnesium ion with a 2+charge. How are these two alike? How are they different? Be sure to use the terms proton, neutron, and electron in your answer.