Which one of the following elements is most likely to form a 2 - ion?

Question 4 options:

a) selenium

b) scandium

c) silicon

d) strontium

e) iodine

Thorium-234 has a half-life of 24.1 days. How much of a 100-g sample of thorium-234 will be unchanged after 48.2 days?

Which of the following elements has the strongest attraction for electrons? a. oxygen b. sulfur c. aluminum d. boron

What is the avrage atomic mass of zinc

What is the difference between the fields surrounding a stationary charge and those that surround a moving charge?

If you have exactly 2.00 moles each, of two different substances, then which of the following must be true about the two samples?

Provide an explanation at the subatomic level to explain why different colors are observed for different metal salts.

Indicate whether the following statements describe the primary, secondary, tertiary, or quaternary protein structure. (More than one can apply). A. R groups interact to form disulfide bonds or ionic bonds. B.

Equal masses (in grams) of hydrogen gas and oxygen gas are reacted to form water. Which substance is limiting? a. Oxygen gas is limiting b. Hydrogen gas is limiting. c. Water is limiting. d. Nothing is limiting. e.

Many things can cause an organism to become extinct. Here are some possible causes of extinction. Select the human causes of extinction.

Which word equation shows lithium oxide being formed from the reaction between oxygen and lithium? oxygen + lithium oxide Right arrow. Lithium lithium + oxygen Right arrow. Lithium oxide oxygen + lithium Right arrow.