Why is neon in the same group as helium on the periodic table

A volatile liquid is evaporated in a flask in a boiling a water bath ( Temperature = 100°C) with a volume of 297ml. The evaporated gas is condensed in the flask and it is found to have a mass of 0.435g. Atmospheric pressure for that day is 765mmHg.

How does the shape of a structure affect its overall strength

A gas sample occupies 4.2L at a pressure of 101 kPa. What volume will it occupy if the pressure is increased to 235 kPa

Which pair of species have the most nearly identical atomic and molecular properties? 1. 35/17Cl and 80/35Br 2. 7/3Li and 9/4Be 3. 23/11Na and 23/11Na+ 4. 19/9F and 19/9F- 5. 12/6C and 13/6C

A (g) + 2B (g) → C (g) + D (g) If you initially start with 1.00 atm of both A and B and find that at equilibrium 0.211 atm of C is present, what is the value of Kp for the reaction at the temperature the reaction was run?

Think about a neutral magnesium atom. Then think of a magnesium ion with a 2+charge. How are these two alike? How are they different? Be sure to use the terms proton, neutron, and electron in your answer.

What subatomic particle is specifically responsible for combining the atoms together to form a new substance?

A chemist reported that 100 gallons of a gas were available in a laboratory. Which property of the gas did the chemist report?

Is the water density higher than the aluminum density

How many moles of molecular oxygen (o2) are consumed in the complete combustion of one mole of pentane (c5h12) ?