Which of these is a coloured gas : sodium, magnesium, aluminium, silicon, phosphorous, sulphur, chlorine and argon

The electron pair geometry of a molecule is tetrahedral. What is its bond angle if it shows one lone pair of electrons and three bonding pairs? A) Less than 109.5° B) More than 109.5° C) Equal to 109.5° D) Zero

What Is An Exothermic Reaction?

If you were setting up an experiment to disprove spontaneous generation in a liquid medium, which of the following would be essential to the experiment?

List two processes from which it may be concluded that the particles of a gas move continuously.

What is kinetic energy related to? heat position motion electricity

Select the more electronegative element in each pair. a. Cl or Fb. Se or Oc. N or Asd. Na or Mg

Find the molar mass of potassium dichromate, K2Cr2O7

Zn (s) + cu2 + (aq) →zn2 + (aq) + cu (s). part a under standard conditions, what is the maximum electrical work, in joules, that the cell can accomplish if 51.0 g of copper is plated out?

13 This word describes the circulatory system that provides nutrients and oxygen to living cells of the body.

Write the outer electron configuration for the group 15 element in the fourth period.