Don't trust his
SIGNIFICANT FIGURES:
1) ALL non-zero numbers (1,2,3,4,5,6,7,8,9) are ALWAYS significant.
2) ALL zeroes between non-zero numbers are ALWAYS significant.
3) ALL zeroes which are SIMULTANEOUSLY to the right of the decimal point AND at the end of the number are ALWAYS significant.
4) ALL zeroes which are to the left of a written decimal point and are in a number >= 10 are ALWAYS significant.
5) If you can/must get rid of the zeroes, then they are NOT significant
NOTES:
-The electron was discovered by using experiments with CATHODE rays in the late 1800s
-Ernest Rutherford discovered the nucleus in 1911
-Atoms of different elements combine in whole number ratios to make compounds.
-In chemical reactions, atoms are combined, separated o rearranged.
-All matter is composed of extremely small particles called atoms.
-Atoms may have different isotopes (basically a different number of neutrons in the nucleus) and hence have different mass.
-Atoms cannot be created or destroyed in a chemical reaction.
-Atoms can be split, as in the decay of Uranium.
-The law of conservation of mass states that matter is neither created nor destroyed
- S orbitals have a spherical shell shape
- P orbital is a dumbbell-shaped
- S can hold 2 electrons
- P can hold 6 electrons
- D can hold 10 electrons
- F can hold 14 electrons
* 1s2 2s2 2p6 3s2 3p3 4s2 3d10 *
-Isotopes are atoms of the same element that have different number of neutrons
-The masses of isotopes are different because they have a different number of protons and neutrons
Atoms Unite!
Let’s Make a Bond Webquest Introduction
A chemical bond form when atoms combine to form stable compounds and molecules. In this activity you will learn about different types of chemical bonds and how they are formed. You will also learn why some atoms bond with other atoms and why some do not bond. Complete the worksheet as you learn about chemical bonding in this web quest. Log on to the
1) ALL non-zero numbers (1,2,3,4,5,6,7,8,9) are ALWAYS significant.
2) ALL zeroes between non-zero numbers are ALWAYS significant.
3) ALL zeroes which are SIMULTANEOUSLY to the right of the decimal point AND at the end of the number are ALWAYS significant.
4) ALL zeroes which are to the left of a written decimal point and are in a number >= 10 are ALWAYS significant.
5) If you can/must get rid of the zeroes, then they are NOT significant
NOTES:
-The electron was discovered by using experiments with CATHODE rays in the late 1800s
-Ernest Rutherford discovered the nucleus in 1911
-Atoms of different elements combine in whole number ratios to make compounds.
-In chemical reactions, atoms are combined, separated o rearranged.
-All matter is composed of extremely small particles called atoms.
-Atoms may have different isotopes (basically a different number of neutrons in the nucleus) and hence have different mass.
-Atoms cannot be created or destroyed in a chemical reaction.
-Atoms can be split, as in the decay of Uranium.
-The law of conservation of mass states that matter is neither created nor destroyed
- S orbitals have a spherical shell shape
- P orbital is a dumbbell-shaped
- S can hold 2 electrons
- P can hold 6 electrons
- D can hold 10 electrons
- F can hold 14 electrons
* 1s2 2s2 2p6 3s2 3p3 4s2 3d10 *
-Isotopes are atoms of the same element that have different number of neutrons
-The masses of isotopes are different because they have a different number of protons and neutrons
Atoms Unite!
Let’s Make a Bond Webquest Introduction
A chemical bond form when atoms combine to form stable compounds and molecules. In this activity you will learn about different types of chemical bonds and how they are formed. You will also learn why some atoms bond with other atoms and why some do not bond. Complete the worksheet as you learn about chemical bonding in this web quest. Log on to the