Why do electrons enter the 4s orbital before entering the 3d orbital?

Which of the following is absent in the three cell model of global circulation? O the Coriolis force O Earth axis tilt O thermal circulation cells O solar heating of Earth's surface

What is the molar mass of magnesium (Mg) ? A 12.00 g/mol B 22.99 g/mol C 24.31 g/mol D 26.98 g/mol

As the temperature of a liquid increases, its vapor pressure (1) decreases (2) increases (3) remains the same

Use the electron configurations and the periodic table to answer the questions: HEILL 1s 2p Which element is this? fluorine (F) carbon (C) nitrogen (N) oxygen (0)

For a particular sample of and ideal gas. Suppose that the pressure is increased which of the following os a possible direct result

Before the initial explosion was the matter hot or cold

Which of the following atoms has seven valence electrons? chlorine (Cl) nitrogen (N) manganese (Mn) oxygen (O)

A.) During an experiment, a student adds 2.90 g of CaO to 400.0 mL of 1.500 M HCl. The student observes a temperature increase of 6.00 °C. Assuming the solution/'s final volume is 400.0 mL, the density if 1.00 g/mL, and the heat capacity is 4.

Consider the ionic compound magnesium acetate. How many electrons does the magnesium ion have

What are two parts of the peripheral nervous system