27. The electronic configuration of two elements are given below. Name these elements. Write a molecular formula of the compound formedy
the combination of these elements. Write the chemical equation for the
chemical reaction takes place when thus formed compound is treated
with the HCI
a. 1s2s 2p b. 1s",2s 2p 3s

Why doesn't heat added to water make the tempature rise above 100c

Astable electron arrangement for an atom is one that does not easily change. how is this arrangement arrived at? a. valence electrons are transferred or shared to create a full outer shell of electrons. b. valence electrons are discarded into space to create a full outer shell of electrons. c. protons (positive charge) pair with valence electrons (negative charge) to create a strong bond. d. outer shells with valence electrons are transferred or shared.

Hydrogenation reactions, in which h2 and an "unsaturated" organic compound combine, are used in the food, fuel, and polymer industries. in the simplest case, ethene (c2h4) and h2 form ethane (c2h6). if 140 kj is given off per mole of c2h4 reacting, how much heat (in mj) is released when 12 kg of c2h6 forms?