Which of these sets of elements has similar properties?

chromium, magnesium, iron, cobalt

oxygen, nitrogen, carbon

strontium, magnesium, calcium, beryllium

hydrogen, helium, neon

If a substance consists of only one kind of atom, it is an ... A. mixture B. element C. solution

A force is applied to an object on a frictionless surface. it produces an acceleration of 3m/s2. what are the possible values for the applied force and for the mass of the object? a. 2 force/N and 5 mass/kg b. 2 force/N and 6 mass/kg c.

What is the term for the smallest bit into which a chemical substance can be divided and still have the properties of that substance? A) electron B) atom C) molecules D) iron

Vocabulary. Use your own words to describe what energy is.

Find the molar mass of the following compounds: CaCO3 Mg (OH) 2 H2SO4

Which of the following statements is not considered weather? The wind is blowing 20 miles per hour right now in Kansas. It is raining in Seattle. It is usually humid in Florida. It is snowing in Colorado.

A nickel atom (Ni) has a mass numbet of 61. how many neutrons does the atom have

Select the more electronegative element in each pair. a. Cl or Fb. Se or Oc. N or Asd. Na or Mg

Find the molar mass of potassium dichromate, K2Cr2O7

Zn (s) + cu2 + (aq) →zn2 + (aq) + cu (s). part a under standard conditions, what is the maximum electrical work, in joules, that the cell can accomplish if 51.0 g of copper is plated out?