Study your flashcards anywhere!

Download the official Cram app for free >

  • Shuffle
    Toggle On
    Toggle Off
  • Alphabetize
    Toggle On
    Toggle Off
  • Front First
    Toggle On
    Toggle Off
  • Both Sides
    Toggle On
    Toggle Off
  • Read
    Toggle On
    Toggle Off
Reading...
Front

How to study your flashcards.

Right/Left arrow keys: Navigate between flashcards.right arrow keyleft arrow key

Up/Down arrow keys: Flip the card between the front and back.down keyup key

H key: Show hint (3rd side).h key

A key: Read text to speech.a key

image

Play button

image

Play button

image

Progress

1/73

Click to flip

73 Cards in this Set

  • Front
  • Back
The word meaning middle or center is
Nucleus
2 atoms combine to form a
Molecule
The smallest whole unit of an element that still has the properties of that element is the
Atom
Atoms differ from one another because they have a different number of
protons or diff. atomic number
Bonding formed from electron transfer is called_______,and the resulting substance is called
ionic bond


ionic compound
Ionic bonding results in a lattice work formed from an attraction between______,That have different charges
ions
-+-
+-+
Covalent bonding results in a ______ being formed
Molecule
If and atom gives up electrons it becomes a___________ ________
Positive ion
If an atom gains electrons it becomes a
Negative Ion
Which one of the following is a poitive ion, which is a negative ion, which is a negative ion, which is neutral
see pink sheet
C6H1206 is called a chemical _________
Formula or compound
How many carbons are there in # 11
Six
The numbers you used to count the atoms are called ______________
Subscripts
2 Ca(PO4)2 Count the atoms in this formula
2Ca 4P 16 O
The small number two is called a __________
Subscript.
The large number two is called a _______________
Coefficient
all atoms prefer 8 electrons in their outer shell. this is called the
Octet rule.
2 elements prefer 2 electrons in their outer shell, they are_____ and ____
He and H
Horizontal rows in the periodic chart are called ___
Periods
Vertical columns are called
Groups or Families
As you go across the periodic chart, what is happening.
Atomic # increases and Protons increase by 1.
Name the following compounds
CuCl2
Ag2S
MgBr2
The molecules in # 21 are binary compounds. What does binary compound mean
Two elements
Draw a Bohr atom of Oxygen
Look at 6P and IV
Draw a lewis dot of Oxygen
Ch4 Melecular formula
What is a balanced equation
Atoms on both sides of arrow are equal.
Refer to your balancing equation worksheet and make sure you understand how to balance equations.
See W. 3
Define a neutral atom
Same # of Protons in nucleus
Has no charge
Define and inert atom
Full shell on outside
Does not react.
Which atoms are inert
All of group 8 atoms
noble gases
Write the symbol of potassium with the atomic number and atomic mass.
39
K
19
The number of electrons in the outer shell of an atom is called the ______________
Valence
How do you determine the number of valence electrons in an atom
Look at the Group #
When atoms gain, lose or share electrons with other atoms, they form chemcial____
Bonds.
Atoms form cheical bonds in order to satisfy the ____
rule.
Octet
O2 is an example of a molecule of an ______
Element
This is because the ____________________________
ATOMS ARE THE SAME.
Diatonic molecules.O2,Br2
Cl2,F2,H2
If you have an atomic number of 10, the number of electrons is ____ in a neutral atom.
10
If you have the 12 electrons, the number of protons is____ in the neutral atom.
12
If you have an atomic number of 15 and an atomic mass of 35, the number of neutrons is _____
20
What is an ion?
Charged atom + or-
If an atom has 20 protons, and has a charge of -1, then it mush have _____electrons.
21
What is an ionic Bond
Force between 2 opposite ions + and -.
If an atom has 18 portons in the nucleus and 17 electrons in its orbitals, it must have a charge of_______
+1
The starting substances in a reaction are called _______
Reactants
What you end up with in a reaction are called
Products.
Give four ways you can tell a chemical reaction is occurring.
Color change -Temp. Change Bubbles of gas - Precipitate(solid)
Wat does pricitate mean
2 liquids --a solid
What are the 4 phases of matter
Plasma, gas, liquid, solid
Draw a molecular formula for water
H2O
Draw a structural formula for water
O
H H
What additional information do you get in a structural formula.
Where bonds are located
Be able to write a word equation for any equation on your balancing worksheet
See lead paint and Boggie lab
Why are valence electrons important?
Gives group # and they are involved in bonding.
What determines which atom you have?
Proton #
What is the atomic mass of uranium
238
What is the atomic number or Arsenic?
33
What is the number of electrons in radon?
86
How many electrons in a ion of Potassium with a +1 charge
K+1 draw this ion.
How many electrons in an ion of oxygen with a -2 charge
O -2
A______________ is a substance that cannot be broken down into simpler substances.
Element
A__________ is the smallest particle of a matter having all that element's characteristics.
atom
The ______ is made up of protons and neutrons.
Nucleus
Small particles that have mass and positive electrical charges are_________.
Protons
Particles that have about the same mass as protons, but that are electrically neutral are_________
neutrons.
Surrounding the nucleus of an atom are tiny particles called_______
Electron, which have little mass, but have negative electrical charges that are exactly the same magnitude as the + charges of protons
The number of protons in an atom's nucleus is the
Atomic Number
When atoms of the sme element have different mass numbers, they are known as ___________ of that element
Isotopes
The spontaneous process through which unstable nuclei emit radiation is called
radioactivity
A__________ represents the area in an atom where an electron is most likely to be found.
energy level
The ourtermost electrons of an atom are called.
valence electrons
The combined number of protons and neutrons is the
mass number
The _______ is the average of the mass numbers of the isotopes of an element
atomic mass