how many valence electrons are found in most atoms of noble gases use this information to explain why the noble gases are unreactive

The cells of plant and animals lack nuclei

Calculate the subatomic particles for a given atom. a. Sulfur (S) b. Cobalt (Co) C. Uranium (U) d. Lead (Pb)

Calculate the amount of work done, in joules, when 2.5 mole of H2O vaporizes at 1.0 atm and 25°C. Assume the volume of liquid H2O is negligible compared to that of vapor. (1 L·atm = 101.3 J)

Which gas sample would likely not act like an ideal gas? Choose one of the following, 1. A sample of oxgen gas at low pressure 2. A sample of oxygen gas at high temperature 3. A sample of argon gas at high pressure 4.

BF3 + Li2SO3 - - - > B2 (SO3) 3 + LiF. What is the coefficient of lithium fluoride in the balanced chemical reaction? A. 1 B. 2 C. 3 D. 4

Give 3-5 pieces of evidence to support why cloning is bad.

Nitrogen combines with oxygen to form nitrogen monoxide (no) and nitrogen dioxide (no2). a sample of no consists of 1.14 g of oxygen and 1 g of nitrogen.

The modern periodic table reflects many improvements to Mendeleev's original table. If Mendeleev's table was incorrect, why is it still studied in chemistry classrooms today?

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Explain how the nettle is adapted for defence and protection