According to the periodic table, which element has an atomic number of 40?

a. u

b. ca

c. zr

d. np

Why is it that the north star is the only star in the night sky that seems to stay still

What makes and acid an acid?

Which organelles are unique to plant cells? chloroplasts mitochondria vacuoles nuclei

How many molecules of h20 contain 2.0 x 10^22 molecules of water?

Which of the following, in the solid state, would be an example of a molecular crystal? 1. iron 2. diamond 3. None of these 4. carbon dioxide

Name the two sub-atomic particles in the nucleus of an aluminium atom.

Identify the true statement. Choose one: A. The expansion of ice sheets at the end of the Pleistocene caused glacial rebound in northern Canada. B. Regions covered by glacial ice are termed periglacial environments. C.

What is the concentration when 0.065 moles of NaNO3 are dissolved in enough water to make 150.0 mL of solution?

What are the reactants and products of cellular respiration and photosynthesis?

Which situation would probably NOT result in the formation of new species? A) The introduction of a predatory fish that only eats the largest native bass in a Georgia lake.