Which group of elements are the most important for living organisms?/

a. carbon, lead, and tin

b. carbon, nitrogen, and oxygen

c. boron, aluminum, and nitrogen

d. arsenic, antimony, and oxygen

Both acids and bases are commonly used as cleaners. a. True b. False

What trend does the first ionization energy follow going across the periodic table?

Potassium iodide (ki) exhibits predominantly ionic bonding. the k and i ions have electron structures that are identical to which two inert gases?

As the human population grows, some minerals in everyday products could become scarce. Which of the following is the best way to address this problem?

In what way are Paul Robeson and Sonia Sotomayor alike? A. All the above B They both started ethnic studies programs in their hometowns. C. They are both people of color who were the first to do something in their fields. D. They are both Hispanic.

Which is an inner planet? Neptune earth Saturn Jupiter

Which item takes the most amount of water to produce

1. Which of the following two ingredients can combine to make a compound? a. Salt and water b. Hydrogen and oxygen c. Eggs and butter d. Sugar and water 2.

What are two ways climate can influence weathering?

A light has a wavelength of 4.10*10^12m. What is the Frequency?