1. electronegativity is: a) how strongly an atom pulls electrons to itself when it is bonded to other atoms b) how much energy is needed to take an electron away from an atom c) how large an atom is d) the energy needed to add an electron to an atom 2. which element has the highest electronegativity? a) si b) p c) s d) cl 3.which element has the lowest electronegativity? a) be b) sr c) ca d) mg 4.order the following elements from lowest to highest electronegativity? f, li, c, n, o a) f, li, o, n, c b) n, c, li, f, o c) li, c, n, o, f d) li, c, o, n, f 5.on the periodic table, electronegativity increases going down a group and decreases going across a period. a) true b) false

What does the process of natural selection involve

Oxidation-reduction reactions (often called "redox" for short) are reactions that involve the transfer of electrons from one species to another. oxidation states, or oxidation numbers, allow chemists to keep track of these electron transfers. in general, one element will lose electrons (oxidation), with the result that it will increase in oxidation number, and another element will gain electrons (reduction), thereby decreasing in oxidation number. the species that is oxidized is called the reducing agent or reductant. the species that is reduced is called the oxidizing agent or oxidant. to sum up: oxidation = increase in oxidation state = loss of electrons = reducing agent reduction = decrease in oxidation state = gain of electrons = oxidizing agent part a which element is oxidized in this reaction? fe2o3+3co→2fe+3co2 enter the elemental symbol. view available hint(s) is oxidized part b which element is reduced in this reaction? 2hcl+2kmno4+3h2c2o4→6co2+2mno2+2kcl+4h2o enter the elemental symbol. view available hint(s) is reduced

0.09 moles of sodium sulfate in 12 ml of solution