SUBATOMIC PARTICLES
PURE SUBSTANCES AND MIXTURES
PERIODIC TABLE
ISOTOPES, IONS AND ORIGINS
ATOMIC THEORY
100
This is a positively charged particle in the nucleus of the atom.
What is a proton?
100
True or false: heterogenous mixtures can be a mixture of solids, liquids, and/or gases.
True.
Mixtures can be any combination of all states of matter: solids, liquids, and gases.
100
The atoms found in this category tend to have a -3 charge.
What is Group 15 (new Periodic Table) or Group VA?
100
These are elements with the same number of protons but different number of neutrons.
Isotopes
100
Organized the periodic table in such a way he could predict elements that were not yet discovered and led to our modern periodic table.
Dmitri Mendeleev
200
This is an uncharged particle in the nucleus of the atom.
What is a neutron?
200
What is the smallest unit of an element that maintains all the properties of that element?
Atoms
200
What makes up the majority of the periodic table?
What are metals?
200
How many electrons are in oxygen ion with a charge of -2?
10 electrons
200
Dalton stated all atoms of a given element are identical. Why is this not true?
1. Isotopes exist of the same element and each can have a different numbers of neutrons.
300
The number of protons for the element Calcium (Ca)
What is 20?
300
Is a heterogeneous mixture chemically bonded? Elaborate.
No. Heterogeneous mixtures are combined but not chemically like compounds.
300
This represents the identity of an element and does not change for that element.
What are protons?
300
What's the purpose behind distillation?
separates liquids with differing boiling points via evaporation and condensation.
300
Why would a stream of particles in a cathode ray tube deflect toward a positively charged metal plate?
The stream is composed of negatively charged particles called electrons.
400
Where are protons located in an atom?
nucleus
400
What is another term we can use for homogeneous mixtures that contains a solute and solvent?
Solution
400
In this category, a mystery element Z is a non-lustrous solid and a poor conductor of electricity.
What are nonmetals?
400
Name two substances accidentally discovered by alchemists that were mentioned in class.
Any of the following are correct:
-Arsenic
-Phosphorus
-Sulfuric acid
-Zinc
-Ammonium chloride
-Nitric acid
400
What did Rutherford infer about the structure of the atom after conducting his gold foil experiment?
He surmised atoms must have a dense and positively charged center. A positive nucleus.
500
How many neutrons does the following element have?
What is 61 neutrons?
500
Which of these statements are true about compound?
A. Compounds can be found in the periodic table.
B. Compounds are pure substances.
C. Compounds are made up of two or more pure substances.
D. Compounds can be separated by physical means.
B and C
Compounds are pure substances and are made up of two or more elements.
*Elements can be found in the periodic table.
*Compounds can only be separated by chemical means.
500
The seven diatomic elements found in nature (meaning they are found bonded to themselves).
What are Br, I, N, Cl, O, H, and F?
500
How many protons, neutrons and electrons are in Arsenic-68?
Protons: 33, Neutrons: 35, Electrons: 33
500
The law of constant composition states atoms in a given compound will always combine in the same mass ratio and whole number ratio of elements. Determine the mass ratio of the compound: CH4
12g:4g or 3g:1g