What is the electron configuration of an element with atomic number 20?

Why does one oxygen atom bond with two hydrogen atoms to make a water molecule?

Salt seems to dissappear when it is poured into water. Use mixture, solution, and dissolve to explain what happens.

Which type of scientist would determine the different kinds of fat found in milk chocolate

How many particles would be found in a 89.2 g sample of Na?

Determine the specific heat of a certain metal if a 450 gram sample of it loses 34 500 Joules of heat as its temperature starts at 150 °C and drops to 53 °C.

Foods labeled "fat free" can actually contain less than 0.5 grams of fat.

Plants make their own food. The chemical reaction for this process is shown in the equation below. CO2 + H2O + energy → C6H1206 + O2 What are the products in this chemical reaction? O A. C6H1206 + energy O B. H20 + energy O C. CoH1206+02 O D.

Using ohm's law, explain how voltage changes in relation to current, assuming that resistance remains constant.

An average copper penny minted in the 1960s contained about 3.000 g of copper. how much chalcopyrite had be mined to produce 100 pennies?

Which pack has the greatest change in enthalpy, warm packs (such as hand warmers) or cold packs (such as an ice pack) ?