Atom
Atoms are made of three partical called?
eletrons, protons and neutrons
What is a periodic table?
chart that list molecules.
oxygen 85%, Hydrogen 10%, Chlorine 2%
Earths ocean
If a compound has 4 atoms of aluminum (Al) and 2 atoms of oxygen (O) what will the chemical formula look like?
Al4O2
what does h2o mean?
water
what has a postive charge?
Proton
What does an element's atomic number represent?
the number of protons
nitrogen 78%, oxygen 21% others 1%
Earth atmosphere
If a compound had atoms 5 oxygen(O) and atoms 6 Hydrogen (H) what would the formula look like?
O5H6
what does NaCl mean?
table salt
What has a negtive charge
Electrons
What do the colors on the periodic table mean?
If it is a solid,a liquid or a gas at room temperature.
oxygen 65%, carbon 18% hydrogen 10%, nitrogen 3% others 4%
Living organisms
If a compound has atoms 3 aluminum (Al) and atoms 4 nitrogen (N) what would the formula look like?
Al3N4
What does CO2 mean?
cobindiaside
What has no charge
Neutrons
Which of the following is characteristic of a metal?
It conducts heat and electricity.
oxygen 47%, silicon 28%, iron 5%, calcium 3%, aluminum 8%, others 9%
Earth crust
If a compound has atoms 5 aluminum (Al) and 3 atoms of oxygen (O) what would that look like?
Al5O3
what is in the middle
nucleus
Why isn’t water on the Periodic Table?
because it is a compound.
What was the most appareing
Oxygen
If a compound had atoms 7 oxygen (O) and atoms 2 nitrogen (N) what would the formula look like?
O7N2