2. Define the number of electrons on the outer shell of the atoms in the following elements:
- a) 13 Al 2e 8e …
- b) 17 Cl 2e 8e …
- c) 20 Ca 2e 8e 8e …
3. Look at the periodic table. How many electron shells are there in:
- a) the 7 th element
- b) the 10 th element
- c) the 16 th element
- d) the 20 th element
4. Which elements have the following electron configurations?
- a) 1s 2 2s 1
- b) 1s 2 2s 2
- c)1s 2 2s 2 2p 3
- d) 1s 2 2s 2 2p 6

PLS HELP

Table sugar completely dissolved in water is an example of a?

You exhale co2 which is produced during cellular respiration.  co2 combines with the water in your blood's plasma to make up one half of the body's most important buffer pair, carbonic acid.  the more physical activity you engage in, the more co2 your body is producing.  you can see this by putting some of the cabbage indicator in a glass and then blowing bubbles into it through a straw.  can you see a change in the color of the indicator?

Achemical equilibrium between gaseous reactants and products is shown. n2(g) + 3h2(g) ⇌ 2nh3(g) how will the reaction be affected if the pressure on the system is increased? it will shift toward the reactant side as there is lower pressure on the reactant side. it will shift toward the product side as there is higher pressure on the product side. it will shift toward the reactant side as there are a greater number of moles of gas on the reactant side. it will shift toward the product side as there are a fewer number of moles of gas on the product side.