Atoms
Periodic Table
Ion, Atom, or Isotope?
Chemical Equations
Random!!!
100
What is an atom?
An atom is the smallest unit of matter that retains all the properties of whichever element it is.
100
What defines a group/family?
Columns in the period table. They all have the similar characteristics because they have the same number of valence electrons.
100
What is an ion?
An ion is an atom that is no longer neutral because it has lost or gained one or more electrons.
100
The result of a chemical reaction
The product
100
What is a way to change the rate of reaction?
Turn up the heat!!!
200
What is the difference between a neutral atom and an ion?
A neutral atom has the same number of protons and electrons. An ion has either gained or lost one or more electron(s).
200
What gives an element it's Atomic Number?
The number of protons that it has!
200
An atom has the following: atomic number: 17 atomic mass: 35 18 electrons in the electron cloud. *Is this a neutral atom, an ion, or an isotope? Explain.*
An isotope is an atom of a given element that has a different number of neutrons in it's nucleus.
200
What are the 4 ways you can tell a chemical reaction has occurred?
Color change Temperature change Solidification Gas formation
200
My car is rusting. Is rusting an example of a chemical reaction?
Yes. Rusting happens when iron, oxygen, and water combine to create iron oxide.
300
If an atom gains 3 electrons to become stable would it become a positively or negatively charged ion? What sign would you put next to it?
If an atom gains three electrons it becomes a negatively charge ion. -3
300
Potassium (K) has a total of 19 electrons. How many electrons does potassium have in it's outer energy level?
Because potassium is in GROUP 1 on the periodic table we know it HAS 1 electron in it's outer energy level. (or we drew it out)
300
When an element is written: C -3 Has it gained or lost electrons? Is it and ion or an isotope?
It has gained three because electrons have negative charges. It is an ion.
300
The term for the elements at the beginning of a chemical reaction are called...
Reactants
300
What is a synthesis reaction?
when smaller particles (like elements) bond together to form something larger (like compounds).
400
Is a atom with 7 electrons in its outer shell stable? Explain.
An atom with 7 electrons in its outer shell is not stable. In order to be stable, an atom needs to have a full outer shell OR it has to have 8 electrons in it's outer shell.
400
Name this type of bond: metal bonding with nonmetal, gaining/losing electrons, formed by ions.
An ionic bond
400
What happens if I change the number of protons in the nucleus of an atom? Will I end up with an ion, an isotope, or a different element all together? Explain.
If I change the number of protons in the nucleus of an atom (which is not possible) I will end up with a different element all together. H = 1 proton; add 1 proton and you end up with He! Two VERY different elements with different characteristics.
400
Why do chemical reactions release heat?
Because chemical reactions take energy and one form of energy is thermal.
400
Does EVERY chemical reaction need activation energy??
Yes - no matter what type of reaction you have their is always some amount of activation energy needed.
500
Draw a EDD for the following elements: K Xe C H He Circle the stable elements.
Xe - is stable because it has 8 electrons in its outer shell. He - is stable because it has a full outer shell.
500
Name this type of bond: nonmetal bonding with nonmetal, atoms are sharing their valence electrons, creates pure substance called a molecule.
Covalent bonds
500
How do we determine an element's atomic mass?
The average mass of all the isotopes of any given element.
500
What is the difference between exothermic and endothermic reactions?
Exothermic thermic reactions release heat. Endothermic reactions absorb heat.
500
How many cupboards and how many chairs are broken in this classroom?
2 cupboards and 3 chairs
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