# Tutor profile: Emmanuel O.

## Questions

### Subject: Chemistry

Electronegativity, Ionization energy and non metallic character increase in what direction on the periodic table of elements? What about atomic radius?

Electronegativity, Ionization energy and non metallic character increase from bottom left Francium (Fr) to top right Helium (He). Atomic radius, which is the size of an elements electron cloud, increases in the opposite direction with Helium having the smallest radius, and Francium having the largest.

### Subject: Biology

What is the difference between a eukaryotic cell and a prokaryotic cell?

The biggest difference between prokaryotes and eukaryotes is that eukaryotes have a nucleus while prokaryotes do not. They also have other membrane structures called organelles while prokaryotic cells have their cell bound materials floating within the cell membrane

### Subject: Algebra

If given an equation to solve for the variable (x) what method would allow you to find the correct answer to the following: 2 (x+3) = 5x + 2 ?

The order of operation would be "Parenthesis, Exponents, Multiply, Divide, Add, Subtract. First you would solve all the parenthesis, by distributing all numbers or variables to the inside of the parenthesis. In this question, you would multiple (2) by the (x) and (3) to get (2x + 6) on the left side of the equation. Then search for exponents and solve. The sample equation does not have any exponents to be applied. The next step in an equation like this would be to subtract all like variables. The two sets of like variables are the whole numbers (6 and 2), and the (2x and 5x) variables. Subtract 2x from both sides to get 6 = 3x +2. Subtract (2) from both sides to get 4=3x. The next step is to multiply and or divide both sides of the equals sign (=) to isolate and solve for x. When you divide 3 from both sides you get x = 4/3 which would be your answer.

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