Review the Atom
Label the Parts in notebook:
3.

1.

2.

4.
Review the Atom
Label the Parts in notebook:
3. Neutron

1. Nucleus

2. Electron

4. Proton
Elements and Compounds 2

Foundation Science 4 Class Code SC22102
Molecules
A molecule is 2 or more atoms connected to each other
Compounds
A compound is 2 or more DIFFERENT atoms connected
to each other
Practice
Answer molecules, compounds, or both in your foundation
notebook.
1.

2.

3.

4.

5.

6.

7.

8.
Answer Questions in Notebook
1.
2.
3.
4.
5.

A ________ is 2 or more atoms connected to each other.
A ________is 2 or more...
Answers
1.
2.
3.
4.
5.

A molecule is 2 or more atoms connected to each other.
A compound is 2 or more DIFFERENT atoms con...
Elements in the Human Body
The human body is made up mostly of Oxygen (65%),
Carbon (18%) and Hydrogen (10%).
We are about...
Elements in the Earth’s Crust
Earth’s crust is the outer layer…

Crust is:
50% Oxygen (O)
26% Silicon (Si)
7% Aluminum (Al...
Atoms Like to Give or Share Electrons
This bonds them together
This creates a NEW substance called a molecule, with
new pr...
Sodium (Na)
Atoms Like to Give or Share Electrons
This bonds them together
This creates a NEW substance called a molecule, with
new pr...
Types of Chemical Bonds
Covalent Bond – atoms share outer electrons
Ionic Bond – electron moves from one atom to another
Examples of Ionic and Covalent Bonds
Water (H2O) is a covalent bond

Sodium chloride (NaCl) is an
ionic bond
Classification of Elements
Elements are classified into 3 states:
Solid
Silver
Liquid
Solid
Gas

Bromine
Liquid

Chlorine ...
Chemical Formulas
The chemical formula shows what atoms and how many
are present in the compound.
Example…

H2O
Atomic sym...
Chemical Formulas
Practice with using chemical formulas:

Alcohol C2H5OH
What atoms are present in this compound?
Carbon (...
1.
2.
3.
4.
5.
6.
7.
8.

Answer In Your Notebook

What is the most common element in the human body (by mass)?
What is the...
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Elements and Compounds 2

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Elements and Compounds 2

  1. 1. Review the Atom Label the Parts in notebook: 3. 1. 2. 4.
  2. 2. Review the Atom Label the Parts in notebook: 3. Neutron 1. Nucleus 2. Electron 4. Proton
  3. 3. Elements and Compounds 2 Foundation Science 4 Class Code SC22102
  4. 4. Molecules A molecule is 2 or more atoms connected to each other
  5. 5. Compounds A compound is 2 or more DIFFERENT atoms connected to each other
  6. 6. Practice Answer molecules, compounds, or both in your foundation notebook. 1. 2. 3. 4. 5. 6. 7. 8.
  7. 7. Answer Questions in Notebook 1. 2. 3. 4. 5. A ________ is 2 or more atoms connected to each other. A ________is 2 or more DIFFERENT atoms connected to each other _________ is anything that has mass and takes up space. An ________ is the basic unit of matter. When something is made up of only one type of atom, it is called an ___________. 6. The ________ __________ is the number of protons in an atom. 7. Water (H2O) is a ______ (compound, molecule or both) 8. Nitrogen (N2) is a _______ (compound , molecule or both)
  8. 8. Answers 1. 2. 3. 4. 5. A molecule is 2 or more atoms connected to each other. A compound is 2 or more DIFFERENT atoms connected to each other Matter is anything that has mass and takes up space. An atom is the basic unit of matter. When something is made up of only one type of atom, it is called an element. 6. The atomic number is the number of protons in an atom. 7. Water (H2O) is a both (compound, molecule, both) 8. Nitrogen (N2) is a molecule (compound, molecule, both)
  9. 9. Elements in the Human Body The human body is made up mostly of Oxygen (65%), Carbon (18%) and Hydrogen (10%). We are about 70% water (= H and O) The body also has: 3.2% Nitrogen 1.5% Calcium 1.0% Phosphorus
  10. 10. Elements in the Earth’s Crust Earth’s crust is the outer layer… Crust is: 50% Oxygen (O) 26% Silicon (Si) 7% Aluminum (Al) 4% Iron (Fe)
  11. 11. Atoms Like to Give or Share Electrons This bonds them together This creates a NEW substance called a molecule, with new properties Sodium (Na) metal is very dangerous and explodes in water Chlorine (Cl) is a very dangerous gas
  12. 12. Sodium (Na)
  13. 13. Atoms Like to Give or Share Electrons This bonds them together This creates a NEW substance called a molecule, with new properties Sodium (Na) metal is very dangerous and explodes in water + Chlorine (Cl) is a very dangerous gas But together, table salt (NaCl) is completely safe
  14. 14. Types of Chemical Bonds Covalent Bond – atoms share outer electrons Ionic Bond – electron moves from one atom to another
  15. 15. Examples of Ionic and Covalent Bonds Water (H2O) is a covalent bond Sodium chloride (NaCl) is an ionic bond
  16. 16. Classification of Elements Elements are classified into 3 states: Solid Silver Liquid Solid Gas Bromine Liquid Chlorine Gas
  17. 17. Chemical Formulas The chemical formula shows what atoms and how many are present in the compound. Example… H2O Atomic symbols How many hydrogen atoms present If there is no number it means there is 1 atom
  18. 18. Chemical Formulas Practice with using chemical formulas: Alcohol C2H5OH What atoms are present in this compound? Carbon (C), Hydrogen (H) and Oxygen (O) How many of each atom is present? 2 carbon atoms 6 Hydrogen atoms 1 oxygen atom
  19. 19. 1. 2. 3. 4. 5. 6. 7. 8. Answer In Your Notebook What is the most common element in the human body (by mass)? What is the most common element in the earth’s crust (by mass)? Is sodium metal (Na) a safe material? Is chlorine gas (Cl) safe to breathe? Is sodium chloride (NaCl) safe? A ________ bond shares its electrons. In a _________ bond electron(s) go from one atom to another. How many atoms of each element are present in the compounds: Refined sugar, C12H22O11 Sulphuric acid, H2SO4 Glucose, C6H12O6 Urea, CO (NH2)2 9. Which compound from above is this? 10. What is the chemical formula for butane?

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