Chemistry

Vocab

100

Water droplets sticking on a leaf is an example of ______________.

adhesion

200

The tendency of water to stick to itself creating strong surface tension is an example of _____________.

cohesion

300

___________ gets dissolved and _____________ does the dissolving.

solute, solvent

400

Atoms of the same element with different numbers of neutrons

isotopes

500

In a ______________ components are equally distributed while in a ______________ components are unequally distributed.

solution, mixture

Bonds

100

Electrons are shared and form _____________.

covalent, molecules

200

Electrons are transferred and form ___________.

ionic, ions

300

A + B ---> AB

A + B are the ____________

AB is the ___________

reactants, product

400

What does the Law of Conservation of Mass state?

Matter can't be created or destroyed

500

Balance the equation:

Li + F2 ---> LiF

2Li + F2 ---> 2LiF

Periodic Table

100

_____________ are positive, ________________ are negative, and _____________ are neutral.

protons, electrons, neutrons

200

Atomic number is the number of ____________

protons

300

Mass number is the number of _______________

protons and nuetrons

400

What is the atomic number of Sodium?

11

500

Draw the dot model of Sulfer

***see drawing

Water

100

A water molecule forms as a result of a ___________ bond between 2 hydrogens and a singular oxygen.

covalent

200

Adjacent water molecules are attached by a ____________ bond.

hydrogen

300

The __________________ on a water molecule has a more negative charge while the __________________ on a water molecule has a more positive charge.

oxygen, hydrogen

400

What makes a water molecule polar?

uneven distribution of charges

500

Draw out 3 water molecules and label the bonds correctly.

*** See drawing

pH

100

Acids have a pH scale of?

0-6

200

Bases have a pH scale of?

8-14

300

What is neutral on the pH scale?

7

400

Weak acids or bases that react with strong acids or bases to prevent sharp, sudden changes in pH

buffer

500

_________ form OH- ions in a solution and _________ form H+ ions in a solution.

Base, Acid