An element has an electron arrangement of 2,8,1. Which group does it belong to?

A 6.00L tank at - 6.4°C is filled with 8.62g of boron trifluoride gas and 16.9g of chlorine pentafluoride gas. You can assume both gases behave as ideal gases under these conditions. Calculate the mole fraction of each gas.

How many neutrons are in the nucleus of an atom with an atomic number of 25

Calculate the formula mass of each compound h2s2

What cell has a genetic material that is contained in a nucleus

Which of the following describes an exothermic reaction? Thermal energy is absorbed by the system. Thermal energy is absorbed by the surroundings. Thermal energy is not transferred. The initial and final temperatures of the system remains the same.

What aspect relates to energy

What is the specific heat capacity of silver metal if 75.00 g of the metal absorbs 56.4J of heat and the temperature rises 35.0°C?

Explain chemical bonds

During an investigation, similar effervescent tablets were dropped into a beaker containing cold water and a beaker containing tap water. The table below shows an incomplete record of the investigation.

The air above earth's surface is at a different temperature what is responsible for this difference in temperature