Chemistry PT

Chemical and physical properties and changes. Chemistry intro. and Periodic Table intro.
STUDY
PLAY

Terms in this set (...)

Chemical Property
Any characteristic giving a substance the ability to change and a new substance appears
Properties of Non-Metals
Dull, poor conductors of heat and electricity, most are gas at room temp, brittle if a solid
Compound
two or more different atoms bonded together
(H2O - CO2)
Physical Change
physical properties change, but the substance stays the same
Electrons
Negative charged particles of an atom. Orbit outside the nucleus in the "cloud"
Atomic Mass
Found under the symbol of an element and tells you the total (average of isotopes) of protons and neutrons
metalloids
Between a metal and non-metal, solid, shiny, not as good at conducting heat and electricity as metals.
element
pure substance made up of only one kind of atom
period
the rows across the table form left to right (have the same number of electron energy levels)
atom
the smallest unit of an element, made up of protons, neutrons, and electrons
chemical change
changes the identity of a substance due to the reactions of the chemical properties. New substances form and some substances are lost. Cannot be reversed.
matter
anything with mass and occupies space
family group (columns)
elements in the same column of the table going from the top down. (similar due to structure)
molecule
2 or more atoms joined chemically
(O2)
non-metals
on right side of table, dull, poor conductors of heat and electricity
Properties of metals
shiny, good conductors of heat and electricity, ductile, malleable, most are solids at room temp.
photosynthesis
water+carbon dioxide+light=glucose+oxygen
liquid+gas+light=solid+gas
H2O+CO2+light=C6H12O6+O2
physical property
characteristic of a material that can be observed/measured without changing it
atomic number
Top number above the symbol and tells you how many protons are in the element
metals
left on the table,shiny, good conductors of heat and electricity
neutrons
"uncharged" particles or neutral - not positive or negative. Found in the nucleus of the atom
protons
Positive charged particles in the nucleus
States of Matter
Solids, liquids, gases, and plasma -
H - O - H
Water
CO2
Carbon Dioxide
physical property examples
melting point, boiling point, flexibility, color, length
chemical change example
Oxygen reacts with iron and water to form rust
chemical property examples
react with water, react with oxygen. flammability, reacts with light, bubbles, flash of light, smoke
What gas does a plant give off after photosynthesis?
Oxygen (O2)
The mass of a tree gets larger over time. Why? Mass cannot be created or destroyed?
The tree uses other mass (CO2, H2O and C6H12O6) to build new cells and the plant grows.
The reactants and products of a chemical reaction will _________________
remain the same
When a chemical reaction takes place what is the most common product produced?
HEAT