CHEMISTRY QUIZ

[00:00:00]All right, rapid recall [music] chemistry quiz. 30 questions in 3 minutes. I'll say a question, you've got a beat to answer, then I reveal it.

[00:00:07][music] Keep score and flex your brain.

[00:00:10]Ready? Question one, what's the chemical symbol for sodium? Na. Question two, what particle has a negative charge?

[00:00:17]Electron.

[00:00:18]Question three, pH seven is what?

[00:00:21]Neutral.

[00:00:22]Question four, two hydrogen and one oxygen make which compound? Water, H2O.

[00:00:28]Question five, table salt's formula?

[00:00:31]NaCl. Question six, the number of protons equals what on the table?

[00:00:36]Atomic number.

[00:00:38]Question seven, what gas do plants release during photosynthesis?

[00:00:43]Oxygen.

[00:00:45]Question eight, what's the most abundant gas in Earth's atmosphere?

[00:00:49]Nitrogen.

[00:00:51]Question nine, endothermic reactions do what with heat? Absorb it. Question 10, what's Avogadro's number?

[00:00:57]>> [music] >> 6.022 * 10 to the 23rd. Question 11, the smallest unit that [music] retains chemical identity? Atom. Question 12, which bond shares electrons, ionic or covalent? Covalent.

[00:01:11]Question [music] 13, H+ concentration defines what scale?

[00:01:16]pH.

[00:01:17]Question 14, what law says mass is conserved in a reaction? Law of conservation of [music] mass.

[00:01:22]Question 15, rusting is oxidation of what metal?

[00:01:26]Iron.

[00:01:27]Halfway check, how many right so far?

[00:01:30]Keep going.

[00:01:31]Question 16, what's the solvent in most salt water?

[00:01:34]Water.

[00:01:35]Question 17, which state [music] has definite volume but no fixed shape?

[00:01:40]Liquid. Question 18, helium's group name? Noble gas.

[00:01:45]Question 19, CH4 is called what?

[00:01:47]Methane. Question 20, [music] what's the process of a solid turning directly into gas? Sublimation. Question 21, acid plus base makes water and what?

[00:01:58]A salt. Question 22, what does a catalyst do? [music] Speeds up the reaction. Question 23, the SI unit of energy, joule. Question 24, PV = nRT [music] is which law? The ideal gas law.

[00:02:13]Question 25, bond between a metal and a nonmetal, ionic. Question 26, the main acid in vinegar, acetic acid. Question [music] 27, the element symbol K stands for potassium. Question 28, liquid to gas at the surface below boiling, evaporation.

[00:02:31]Question 29, H2O2 is commonly called hydrogen peroxide. Question 30, what do isotopes of an element differ in? Number of neutrons. Add your score.