Chemistry Flashcards
What Are Two properties protons and neutrons have in common?
Both are found in the nucleus and have almost the exact same mass
A Glass of milk has both Volume and mass, what accounts for most of the volume that the milk takes up in the glass?
the space is taken up by tiny electrons that surround the nucleus of each atom
An atom of calcium has many subatomic particles with positive, negative, and neutral charges, how can an atom of calcium have an overall charge of zero?
The Number of protons and negative electrons is equal and each positive charge cancels out each negative charge, resulting in a overall neutral charge
What is the valence charge on an atom of boron?
3+
Which element is described in the following sentence, an atom of this element has 14 neutrons, and 13 electrons
Aluminum
Out of (alkali metals, alkali earth metals, noble gases, and halogens, rank the following, from least reactive, (1) to most reactive(4)
Nobel gases, halogens, Alkali earth metals, and Alkali metals
How many atoms are in 3NaCl
6
How many atoms are in Al(OH)
7
How do Lewis Diagrams differ from Bohr diagrams?
Lewis Diagrams show only the bonding (valence) electrons, while Bohr diagrams show all electrons in the atoms involved
which element is in period 3 group 2?
Magnesium
what do fluorine, Chlorine, and bromine all have in common?
they belong to the halogen family of elements, They all have a relatively small atomic radius, and in a binary compound, they are the second element.
Describe, element
A chemical element is a substance that cannot be further broken down by any chemical reaction
describe, compound
a substance made from two or more different elements that have been chemically joined.
describe homogeneous mixture
a mixture of substances blended so thoroughly that you cannot see individual substances.
describe, heterogeneous mixture
a mixture in which the composition is not uniform throughout the mixture.
