LESSON 1: Atoms, Elements, & Compounds

Question 1

The building blocks of matter

Answer 1

atoms

Question 2

smallest basic unit of matter

Answer 2

atoms

Question 3

the study of matter’s composition and properties

Answer 3

chemistry

Question 4

anything that has mass and takes up space

Answer 4

matter

Question 5

how is the periodic table organized?

Answer 5

increasing atomic number

Question 6

4 basic parts of an atom

Answer 6

the nucleus, protons, neutrons, electrons

Question 7

what is the nucleus

Answer 7

the center of an atom composed of 2 kinds of particles

Question 8

what is a proton

Answer 8

positively charged particles in the nucleus of an atom

Question 9

what is a neutron

Answer 9

particles in nucleus that have no charge but mass

Question 10

what are electrons

Answer 10

negatively charged particles

Question 11

what is an isotope

Answer 11

atoms of the same element consistently have the same number of protons and electrons but a different number of nuetrons

Question 12

what are radioactive isotopes

Answer 12

an isotope that has an unstable nucleus that breaks down over time

Question 13

compounds

Answer 13

a pure substance formed when two or more different atoms combine chemically in in fixed proportions

Question 14

covalent bonding

Answer 14

sharing of electrons to form a compound (gases and liquids)
- water is an example

Question 15

ionic bonding

Answer 15

atoms give up an electron or electrons to become positively charged (solids)
- transfer of electrons
- unlike charges attract to create

Question 16

ion

Answer 16

positively and negatively charged atoms

Question 17

molecule

Answer 17

smallest unit of most compounds