What determines the reactivity of an element?

The number of protons in the nucleus

The number of electrons in the outer energy level

The number of electrons in the innermost energy level

The number of neutrons in the nucleus

How can you tell if an ion is monotonic?

Testing a hypothesis is called a

13. What is a falling objects speed at 6s? 9s? 112s?

Water molecules are made of slightly positively charged hydrogen atoms and slightly negatively charged oxygen atoms. which force keeps water molecules stuck to one another?

Which groups of metals tend to have more than one oxidation number?

This chart shows discrpitions of the atoms for four different substances. Which substance is a solid

What is habitat destruction?

Nancy wants to find out how the steepness of a hill's slope affects the amount of soil that erodes from it. She has soil, a long pan, and a pile of books with which to build a model hillside. She has a watering can to model rainfall.

What is the function of the ribosome

How much energy, in joules, does 150.0 g of water with an initial temperature of 25 C need to absorb be raised to a final temperature of 75 C