Micro mid term - Past quizzes

A double bond involves - two pairs of electrons

Sharing

First law of thermodynamics states

Energy can’t be created or destroyed

There are - naturally occuring elements

98

The interaction of electrons in the valence shells of electrons causes -

Chemical reactions

Buffers resist changes in

pH

Acid is a proton -

Donor

An acid with a pH of 3 gives off — as many hydrogen ions than an acid of pH 5

100

Periodic table is mainly based on

Atomic number

There are - periods on the periodic table and the rows are

7

Horizontal

Phase of matter with ionized particles

Plasma

Isotope has different number of

Neutrons

4 most common elements in cell

C H O N

Most common element in universe is

Hydrogen

Element with 6 protons

Carbon

Group - in periodic table contains noble gasses

18

2 noble gases

argon and Helium

NACL is a — and has — bonds

Compound

Covalent

NAOH is acid or base

Base

Strongest bass has pH of

14

Universe has most entropy