True or false. elements in the same period have the same number of valence electrons

If i have 8 L of 0.25 M solution, how many miles of MgCl2 are present

What substances would be gases at 0 degrees Celsius

Which electron configuration represents the atom with the largest covalent radius?

Explain what property or law made the students realize their experiment was incorrect. A group of students do an activity with baking soda and vinegar. The steps of the activity are listed below: 1. Pour 100 g vinegar into a flask. 2.

Deoxyribonuleic acid stores the gene codes? true or false

Calculate the density of sulfuric acid if 35.4 mL of the acid weighs 65.14 g.

Where the single machos?

A reaction will be spontaneous only at low temperatures if both ΔH and ΔS are negative. For a reaction in which ΔH = - 320.1 kJ/mol and ΔS = - 86.00 J/K · mol. Determine the temperature (in °C) below which the reaction is spontaneous.

Is it possible for a balloon with an initial internal pressure equal to 250.0 kPa to naturally expand to four times its initial volume when the temperature remains constant and the atmospheric pressure is 101.3 kPa?

How many atoms of gold (Au) are present in a sample of 2.5 mol Au? A. 1.5 * 1024 atoms Au B. 1.5 * 1023 atoms Au C. 4.2 * 1024 atoms Au D. 4.2 * 1023 atoms Au