Sig Figs!
When counting the number of significant figures, nonzero numbers and ______ zeros are always significant.
Dalton's Atomic Theory was the first main theory to begin characterizing atoms in relationship to the world around us. This section in the theory states that all matter is neither created nor destroyed.
What is the Law of Conservation of Matter?
A compound containing a metal and a nonmetal is commonly referred to as this.
What is an ionic compound?
The number on top of each element symbol tells us how many protons are in a neutral atom. It's called this and determines how many electrons are in a neutral atom.
What is the atomic number?
Color, hardness, and texture are all examples of these types of properties.
What are physical properties?
6.022 is an important number in chemistry known as Avogadro's number. It also has this many significant figures.
What is four?
Along with JJ Thompson's cathode ray experiment, this experiment helped us determine the mass of an electron.
Al2O3
What is Aluminum Oxide?
Group 17, or the halogens, commonly gain one electron to make them exhibit the same number of electrons as the ___ _____, or Group 18.
In chemistry, we deal with small numbers, like 1.00 10-14 when talking about acids and bases. It also has this many significant figures.
What is three?
Until James Chadwick's work, this subatomic particle wasn't known to exist because of its neutral charge.
What is a proton?
SF6
The __________ ______ are metals with variable charge in ionic compounds.
What are transition metals?
Density is this type of property.
The summation of 93.5 + 9.28 is tricky, and its answer in correct sig figs will be tricky too.
What is 102.8?
Until this experiment by Ernest Rutherford, the plum pudding model was widely accepted. After, the nuclear model became popularized.
What is the gold foil experiment?
TiCl4
What is Titanium(IV) Chloride?
All metals will have a positive charge in binary ionic compounds. This is because they are ______
What are cations?
This type of mixture forms distinct sections between the elements its composed of. That's what makes mixtures cloudy.
What is a heterogeneous mixture?
(94.67 + 7.9) x 6.25
The understanding that all samples of a pure compound contain the same elements in the same ratio of mass.
HNO2
What is nitrous acid?
The number listed at the bottom of an element symbol is the ______, a commonly accepted value of how much an atom weighs.
What is the average atomic mass?
What is 34.9 amu?