Toolkit

How many energy levels does sulfur have?

A. 2

B. 3

C. 4

D. 14

Which element would you expect to be less metallic? (a) Cs or Rn (b) Sn or Te (c) Se or Ge

Solid waste is eliminated from the body through the esophagus agree or disagree

A blood sample is diluted by placing 0.2ml of the blood in a tube and filling the tube to the 5ml mark with a solution. what percent of the solution represents whole blood?

Is sodium hydroxide highly basic?

Which statement best describes a mole? It is used mainly for writing chemical formulas. It is used for chemical equations that have reversible reactions. It is used for directly comparing the amounts of substances.

What is the main function of antibodies? A: "Remembering" the characteristics of germs that have invaded your body in the past B: Creating new white blood cells C: binding themselves to invading antigens D:Signaling your immune system that antigens

In the reaction 2H2O (l) + 2Cl - (aq) → H2 (g) + Cl2 (g) + 2OH - (aq), which substance is reduced? A. H2O B. Cl C. H D. OH E. None of the Above (This is not a redox reaction.)

Which statements about the periodic table's organization are true? Select all that apply. The periodic table is organized by atomic number. The periodic table is organized by reactivity. The periodic table is organized by atomic mass.

He definition "'oxygen' means an element having an atomic weight of 8 and an atomic number of 16" is an example of:

From oxygen silicon chlorine argon which one is a metalloid