10. What represents the number of protons?
11. The horizontal rows on the periodic table are known as what?
12. The vertical columns on the periodic table are known as what?
13. Define the term isotope.
14. Give an example of an ionic compound and a covalent compound.
15. What 4 elements make up most of living things?
16. Contrast ionic and covalent bonds.
17. Draw an electron dot diagram for:
a. Fluorine (atomic number 9)
i. How many electrons are needed to fill the shells for this element?
b. Aluminum (atomic number 13)
i. How many electrons are needed to fill the shells for this element?
18. Write the chemical formula for the following:
A. Sodium chloride B. Potassium permanganate C. Magnesium Sulfate
Answers: 2
Chemistry, 22.06.2019 03:30
At a temperature of 393 k, the temperature of a sample of nitrogen is 1.07 atm what will the pressure be at a temperature of 478 k
Answers: 1
Chemistry, 22.06.2019 12:30
Suppose you wanted to make 100 grams of water. what is the molar mass of water (h2o)?
Answers: 2
Chemistry, 22.06.2019 12:40
Quiz1. which physical state of nitrogen has the highest entropy? a solid© b gasoc liquid
Answers: 1
Chemistry, 22.06.2019 14:00
The content of manganese (mn) in steel was determined spectrophotometrically and with the use of the standard addition method. an unknown sample of mn from a digested steel sample gave an absorbance of 0.185 when analyzed spectrophotometrically. when 5.00 ml of solution containing 95.5 ppm mn was added to 50.0 ml of the unknown steel solution (digested sample), the absorbance was 0.248. calculate the concentration, in parts-per-million (ppm), of mn in the digested steel sample solution.
Answers: 3
10. What represents the number of protons?
11. The horizontal rows on the periodic table are known...
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