Which element has this electron configuration? astatine bromine chlorine fluorine

Atoms of which two elements in the ground state contain the same number of valence electrons A - al & si B - al & b C - al & zn D - al & ge

Illustrate the phases in a homogeneous solution. A) Both solute and solvent are in the same phase in a homogeneous solution. Eliminate B) In a homogeneous solution, the solute and solvent are in different phases.

How does concentration affect the chemical equilibrium?

A 2.5 g copper penny is given a charge of 4.0x10-9 c. how many electrons are removed from the penny?

Calculate the empirical formula from the given percent compositions. 82% nitrogen (N), 18% hydrogen (H)

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