Solids, Liquids, and Gases!
Water!
Elements, Compounds, and Mixtures
Periodic Table of Elements
Molecules
100
In a __________, molecules move very fast.
gas
100
When water freezes, it becomes less dense so it _________________.
Floats
100
What is the difference between a mixture and a compound?
A mixture can be separated easily while a compound can't!
100
In this picture, B is the _______________.
Chemical Symbol
100
What is the chemical formula for water?
H2O
200
Molecules move very slow in a ____________.
solid
200
Water covers what % of the Earth?
70%
200
Is sand and water a mixture or compound?
Mixture
200
In this picture, the 5 is the _________________
Atomic Number
200
A _________________ contains at least 2 different types of elements.
Compound
300
When ______________ energy is added, a solid turns into a gas.
Thermal
300
Particles of water forming a "film" on the surface of water is called ____________________.
Surface Tension
300
Protons have a ________________ charge.
Positive
300
The rows (left to right) on the Periodic Table are called ________________.
periods
300
A _________ is a group of at least 2 atoms chemically bonded-they can be the same or different elements
molecule
400
A __________ has no definite shape and no definite volume.
gas
400
This is the movement of water because of adhesion and cohesion.
Capillary Action
400
Electrons have a ____________ charge
Negative
400
The columns (up and down) on the Periodic Table are called __________ or families.
Groups
400
What elements are in H2O
Hydrogen and oxygen
500
A _____________ has a definite shape and definite volume.
solid
500
Water is considered a ________________ because it can dissolve other molecules.
Solvent
500
Neutrons and Protons are in the _______________
Nucleus
500
The _______________ tells us how many protons and electrons an element has.
Atomic number
500
How many hydrogen atoms and oxygen atoms are in this chemical formula?
3H2O
6 hydrogen and 3 oxygen