Explain and describe(1)
Explain and describe what an atom is. (T)
The smallest particle of an element that can exist.
Explain what matter is. (Z)
Anything that has mass and takes up space.
Explain what oxygen is. An element, compound, or Mixture? (E)
An element. Because it only has 1 type of atom and it's a pure substance.
Explain and describe a mixture. (T)
A combination of 2 or more pure substances in which each substance retains its own identity.
Explain what compounds need in order to be a compound. (E)
It needs two or more different elements chemically bonded.
Explain how many atoms C2H6 has. (T)
It has 8 atoms because Carbon has 2, and Hydrogen has 6 atoms, and 2 plus 6 equals 8.
Describe what a nucleus is. (T)
The central and most important part of an object, movement, or group.
Explain what atoms make up. (E)
Everything.
If you have 4 molecules of ethane (C2H6), how many hydrogen atoms are there total? Explain. (T)
24 atoms. Because the chemical formula for ethane is C2H6, and it has 8 total atoms, you multiply 4 times 8 to get 24 atoms.
Explain what the difference is between an electron and a proton. (E)
An electron has negatively charged particles and a proton has positively charged particles.
Explain why mixtures can be separated more easily than compounds. (T)
Because their components are only physically combined, not chemically bonded.
Explain what a chemical formula? (E)
A chemical formula uses a mathematical relationship expressed in symbols.
Explain what O2 is. Is it an element, compound, or Mixture? (T)
It's an element.
Explain what happens to atoms during a chemical change. (T)
They are rearranged through the breaking and formation of chemical bonds.
Explain how many total atoms there are in AL2O3.
There are 5 total atoms because Aluminum has 2 atoms, and Oxygen has 3 atoms. 2 plus 3 equals 5 atoms.