When the amount of a radioactive substance is reduced by 50%, what has occurred?

gamma radiation

alpha radiation

a half-life

beta radiation

Why is it important for scientists and o make data tables

Jared sprayed a pesticide on his garden three times. The first time, many insects died. The second time fewer insects died. The last time very few insects died. What impact did the insecticide have on the species of insects? A.

1. A debit balance is a normal balance for which type of account A. Accounts payable B. Revenue C. Accounts receivable D. Owner's capital

1. What is the term for a state of matter that has a definite volume and a definite shape?

Which one of the following statements is correct. a. an electron has a neutral electrical change, b. An electron has a negative electrical change. c. An electron is located inside the nucleus of an atom. d. An electron is much larger than an atom.

What does berkelium react with

Classifying living things

Find the parent acid and parent base of al2 (co33, determine if they are strong or weak, and determine if the salt is acidic, basic, neutral, or unpredictable.

A syringe contains 589 mL of CO at 325 K and 1.2 atm pressure. A second syringe contains 473 mL of N2 at 298 K and 2.6 atm. What is the final pressure if the contents of these two syringes are injected into a 1.00 L container at 0.00°C?

Which pair of elements can form an ionic compound? A) Two atoms of hydrogen B) One atom of sodium and one atom of fluorine C) One atom of calcium and one atom of chlorine D) Two atoms of hydrogen and one atom of oxygen