Atoms & PTOE
What is the element name in Group 1, Period 5 and how many protons, electrons and neutrons?
Rubidium (Rb), 37 protons, 37 electrons, and 48 neutrons.
This state of matter has a definite shape and a definite volume.
Solid. Solids have both a definite shape and a definite volume because their particles are tightly packed.
H2+O2 -----> H2O
2, 1, 2
Define Nuclear Fission
The chemical splitting of an atom into two smaller atoms.
MgO is a
Ionic bond.
They are generally shiny, brittle solids that act as semiconductors, making them essential for electronics, with properties intermediate between metals and nonmetals, such as moderate electrical conductivity.
Metalloids. Metalloids tend to be semiconductors or semimetals.
In a saltwater solution, salt acts as the ______.
Solute. Salt is the solute because it dissolves in the solvent (water).
___HCl + ___CaCO3 → ___CaCl2 + ___H2O + ___CO2
2, 1, 1, 1, 1.
The half life of isotope Uranium-24 3 years. How much of a 250g sample would be left if 12 years goes by.
15.625 grams
In a covalent bond, electrons are
shared between atoms
A positively charged ion formed when an atom loses one or more electrons
Cation. An anion is the opposite.
TRIPLE POINT VALUE: When no more solute can dissolve in a solvent at a given temperature, the solution is described as this.
Saturated. A saturated solution contains the maximum amount of solute that can dissolve at that temperature. Any additional solute will remain undissolved.
NaBr + CaF2 → NaF + CaBr2
What coefficients are needed to balance the chemical equation?
2,1,2,1
Renewable resource that requires big turbines in large open fields
Wind energy.
Electrostatic attraction between two oppositely charged ions in a chemical compound.
Ionic
The difference between the Carbon-12 and Carbon-14 isotopes is the
Neutrons. Neutrons is what determines if an element is an isotope.
In this state, particles move freely and spread out to fill any container.
Gas. Gases have no definite shape or volume and expand to fill their container.
In a double replacement chemical equation, what happens?
compounds swap places
The process of nuclear fusion in the Sun requires ___ tempreture and _____ pressure
high; high
Water, H2O, is a molecule made of oxygen and hydrogen. The bonds that hold water molecules together are due to shared electrons, and known as __________ bonds.
Covalent
T or F: Transition metals' valence electrons are 3 and 12.
False. Valence electrons in transition metals vary.
A solution is best described as this type of mixture.
Homogenous. Solutions are homogeneous mixtures because the components are evenly distributed.
Antoine Lavoisier found that mass was conserved in chemical reactions when he saw that ________
the mass of the products was the same as that of the reactants.
Hydrogen bomb is based on the principle of __________________.
Fusion
DOUBLE POINT VALUE: The strong crystal structure of an ionic compound is one of the main reasons why ionic compounds have a __________ melting point.
High