Use the periodic to fill in the numbers in the electron configurations shown below. B: 1s2 2sA2pB

A =

B =

When the limiting reactant in a chemical reaction is completely used, what happens to the reaction? The reaction stops. The reaction speeds up. The excess reactants begin combining. The reaction slows down.

A block of metal with a mass of 42.8 g and has side lengths of 4.2 cm, 5.6 cm, and 9.8 cm

2. You have 2 m3 of a mineral ore sample. It has a mass of 1 * 104 kg. Calculate the density of the ore sample and express your results in g/cm3 with appropriate scientific notation.

Which of the following is true about two neutral atoms of the element zinc? They will always have different masses. Electrons are missing in both the atoms. Both have an equal number of protons. They have different properties.

1.1 Outline a method for separating the chalk from potassium chloride,

The modern periodic table reflects many improvements to Mendeleev's original table. If Mendeleev's table was incorrect, why is it still studied in chemistry classrooms today?

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Explain how the nettle is adapted for defence and protection

How many moles of water vapors are formed when 10L of butane gas is burned in oxygen at STP?

What type of fuel must be most carefully contained and protected