Which Period 4 element has the most metallic properties?

(1) As (3) Ge

(2) Br (4) Sc

Does the moon's shadow change relative to the sun

The element hydrogen is made up of which kind (s) of atoms? A. only oxygen atoms B. only hydrogen atoms C. more hydrogen atoms than oxygen atoms D. more oxygen atoms than hydrogen atoms

Which of the following does not form a diatomic molecule? A. Hydrogen B. Nitrogen C. Chlorine D. Copper

Be sure to answer all parts. Styrene is produced by catalytic dehydrogenation of ethylbenzene at high temperature in the presence of superheated steam.

How many milliliters of a 0.266 m kno3 solution are required to make 150.0 ml of 0.075 m kno3 solution? 42.3 ml 23.6 ml 35.1 ml 18.8 ml?

In the vertical columns of the periodic table, as the atomic numbers increase: a. the number of electron shells increases. b. the ionization energies increase. c. the number of electrons in the valence shell increases. d.

Which of the following solutions contains the largest total concentration of ions, assuming complete dissociation .010 M aluminum chloride .010M sodium chloride .010M aluminum sulfate .010M calcium chloride

What is the relationship between chemical equilibrium and the rates of forward and reverse reaction? a. In equilibrium, the forward reaction rate must be greater than the reverse reaction rate. b.

Choose all that apply: Living organisms use atoms from sugar molecules combined with other elements to form: Question 9 options: Lipids Metals Nonmetal atoms Nucleic Acids

12.5ml of 2.0m NaOH neutralizes 10ml og HCL, what is the acid concentration