i) True-because na2so4 dissolves in water and brake into ions 2) True- ozone Mos

Question

i) True-because na2so4 dissolves in water and brake into ions

2) True- ozone Most atmospheric ozone is concentrated in a layer in the stratosphere, about 9 to 18 miles (15 to 30 km) above the Earth's surface

4) True-. Magnesium, Mg, has two valence are attracted toions with negative charges. The attractive force between such ions holds them together and is called an ionic bond.

5) False-- the reaction that occurs in the sun is two hydrogens fuse to form helium

6) False

7) True-yes it is the main cause of skin cancer

Explanation / Answer

7. True/False (2 points each): i) Na2SO4 (an ionic solid) is soluble in water (polar liquid) ii) The Ozone layer is in the stratosphere at an altitude of about 30 km. iii) Electronegativity tends to increase as we go up a group (decrease in atomic#) or across a period from right to left. iv) A polyatomic ions is a group of atoms that is held together by ionic bonds and has acquired a charge. Nuclear fission is the reaction that provides the sun's energy. A transmutation process is a nuclear reaction in which a nuclide of one v) vi) element is changed into nuclide of the same element. vii) The primary effect at ground level Ozone accumulation is skin cancer.

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