Biology & General Science A
Forces of attraction that holds atoms together
Chemical Bond
electrons in the outermost energy level of an atom
Valence Electron
Dealing with strong emotions, like fear and excitement
Amygdala
It lets you learn new things and remember them for the future.
Hippocampus
What is the chemical symbol for sodium?
Na
Balance the chemical:
S8 + F2 - SF6
S- 8 S - 8
F - 48 F - 48
Hard, Brittle, and conduct electricity when in solution or in molten state
Ionic Substances
A block moves through a displacement of 3.48 m while a force F of 17.89 Newton acts on it. What is the work done by the force on the object?
W = 62.26 joule
The scientists who study minerals.
Mineralogists
Sometimes rocks from space land on Earth these are called
meteorites
as the magma cools different crystals form at different temperatures.
crystallization
a rock that is exposed to extreme heat and pressure but does not melt becomes a metamorphic rock.
metamorphism
DUCTILE
Name the compound: BeF2
Beryllium fluoride
Write the formulas for: Sodium hydride
NaH
Occurs when 2 nonmetals share electrons.
Covalent Bond
Name the following chemical compounds: NO2 & NO
nitrogen dioxide & nitrogen mioxide
Write the formula for the chemical compound:
Nitrogen triiodide
NI3
Formed in metals in their uncharged electrical states.
Mettalic Bond
Write the formula for the chemical compound:
nitrogen trifluoride
Nf3
A body moves through a displacement of 4 m while a force F of 12 Newton acts on it. What is the work done by the force on the body?
Work = force x displacement
W = F x S
W = 12 x 4
W = 48 joule
A motorcycle moves through a displacement of 12.6 m while a force F of 10 Newton acts on it. What is the work done by the force on the object?
W = 126 joule
Formed when metal transfers its electron to nonmetal
Ionic Bond
What is the name of the structure that connects the two chromatids of a chromosome?
Centromere
After scratching, it leaves behind a powder.
Hardness