Which if the following elements has atoms with the least amount of valence electrons

1. k

2. Ca

3. O

4. Mg

5. C

A scientist mixes water (containing no salt) with a solution that contains 45% salt. she wants to obtain 180 ounces of a mixture that is 30% salt. how many ounces of water and how many ounces of the 45% salt solution should she use?

What is the molar mass of sulfur trioxide?

What is similar about the atomic structure of the copper isotopes?

A triglyceride is formed from glycerol and fatty acids by

The ionization energies (kJ/mol) of hydrogen, nitrogen, sodium, chlorine, and fluorine are 1,312, 1,402, 496, 1,256, and 1,681, respectively. Which element is most likely to become a monoatomic ion with fluorine when these atoms interact?

Describe in words the reaction represented by the equation and include a description of the composition of each kind of molecule 2h2+02=2h20

Potassium chloride, kcl, sodium sulfate, na2so4, glucose, c6h12o6, carbon dioxide, co2 and ammonium phosphate, (nh4) 3po4, are soluble in water.

Use the periodic table to select the element from the drop-down menu that has the correct relative electronegativity.

List the symbols for all the elements with electron configurations that end as follows. Each n represents an energy level.

Why is it necessary for the measuring devices to be clean