A ___________________ is made when atoms of different elements join together by chemical bonds.
What is compound
100
What is the chemical name for symbol Ni?
What is Nickel
100
The subatomic particles
What are protons, neutrons, and electrons.
100
In this reaction, a solid becomes a liquid when heat energy is added. (Chemical or Physical)
What is Physical
100
Anything that has mass and takes up space
What is matter
200
This type of bond, electrons from each atom are attracted or “shared” by both atoms.
What is covalent
200
The atomic number of Carbon.
What is 6?
200
The inner part of an atom, composed of protons and neutrons.
What is the nucleus.
200
In this reaction, a substance changes color and a burning smell is released. (Chem or Phys)
What is Chemical
200
Horizontal rows on the periodic table are called
What is periods
300
How many hydrogen atoms are in a water molecule
What is two
300
The number of protons in Calcium.
What is 20?
300
The charge of an electron.
What is negative.
300
What are four examples of chemical change properties (evidence)?
What are color change, gas is produced, smell is produced, the reaction is irreversible, temperature change (without cooling or heating)
300
Substance that is made entirely from one type of atom.
What is an element
400
What is the only way you can separate compounds and molecules?
What is a chemical reaction
400
The valence (or electrons available for bonding) in Oxygen.
What is 6?
400
The charge of a neutron.
What is no charge or neutral.
400
If a bike left outside in the rain makes the bike rusty, is it a physical change or chemical change and why?
What is chemical - color- not same substance
400
Group 18 on the periodic table located all the way to the right. All elements have full electron shells
What is Noble Gases
500
What does the number at the bottom of a chemical formula tell you about that molecule or compound?
What is the number of atoms of that element it contains
500
The chemical symbol for Iron
What is Fe?
500
Atoms share these when they bond.
What are electrons
500
In a chemical change, such as the one that occured in lab 13, this happens to molecues or compunds
What is decompose (decomposition)
500
He explained that the electrons were present in orbits outside the nucleus. The electrons were confined to specific orbits of fixed radius, each characterized by their own discrete levels of energy.