Choose the letter of the choice that best completes the statement or answers the question.

Which of the elements listed below is a metal with 2 valence electrons?

a.

magnesium

c.

platinum

b.

uranium

d.

chlorine

Crocetin consists of elements carbon hydrogen

What is the ph of an aqueous solution with [h3o+] = 4*10-13 m?

Which of the following best explains diffusion? Which of the following best explains diffusion? a. movement of molecules from an area of high concentration to an area of low concentration b. movement of molecules farther away from equilibrium c.

What is the oxidation number is s in li2so4

Which of the following shows a valid combustion reaction? 2Al + 2O2 → 2AlO + O2 C2H4 + 2O2 → 2CO2 + 2H2O 2CH4 + O2 → 2CO + 4H2 Ca + O2 → CaOH

Part 2: Finding Speed and Height Using Energy Directions: Use the KE and GPE equations to solve for speed or height depending on the situation. 1. A 1,000-kg car has 50,000 joules of kinetic energy. What is its speed? 2.

Why is conductivity be the best test to find a metal, non-metal or metalloid?

In which way does a na1 + ion differ from a neutral na atom?

Which would not be associated with stable atmospheric conditions afternoon thunder showers is the answer

Which is not a characteristic of a compound? It is a mixture of elements. It has properties that differ from its component elements. It has a fixed proportion of elements.