BELLWORK Get ready for bellwork 1 5 17
BELLWORK Get ready for bellwork! 1 -5 -17
1. Which phase of matter shown above has the greatest distance between the individual particles? a. liquid b. gas c. plasma d. solid
2. All matter is made of atoms, but things such as energy, time, and force are not made of matter. Identify the item shown below that IS NOT made of atoms. a. Solar Radiation (energy) b. A jet aircraft c. A classic automobile
3. What is the atomic mass of an atom of rubidium, and how many neutrons does each rubidium atom have? a. Rubidium has 86 neutrons, and the atomic mass is 37 b. Rubidium has 49 neutrons, and the atomic mass is 85. 5 c. Rubidium has 37 protons, 37 electrons, and the atomic mass is 85. 5
4. In the periodic table shown below, some elements are shaded. Based on its position in the periodic table, which element is the heaviest? a. helium (He) b. krypton (Kr)
5. From the choices displayed below, select the one that is an element and not a compound. a. Xe b. H 2 SO 4 c. Hg 2 Cl 2
6. Compare and contrast mixtures and compounds. a. Compare: Both contain reactants and products. Contrast: Mixtures-has chem reactions. Compounds-no chem reactions b. Compare: Both contain more than one type of substance Contrast: Mixtures-no chem reactions, Compounds-has chem reactions. c. Compare: Both contain matter made of atoms. Contrast: Compounds-no chem reactions, Mixtures-has chem reactions.
7. Physical changes result in a substance looking different without actually changing the atomic structure of the substance. On the other hand, during chemical changes the substance undergoes chemical reactions at the valence electron level. Which process below most likely produces a physical change, without a chemical change? a. A metal is exposed to water and becomes corroded. b. A solid is exposed to heat and transforms into a liquid. c. Two liquids are mixed together and a solid forms in the solution.
Electrons and Chemical Bonding Video
1. Which phase of matter shown above has the greatest distance between the individual particles? a. liquid b. gas c. plasma d. solid
2. All matter is made of atoms, but things such as energy, time, and force are not made of matter. Identify the item shown below that IS NOT made of atoms. a. Solar Radiation (energy) b. A jet aircraft c. A classic automobile
3. What is the atomic mass of an atom of rubidium, and how many neutrons does each rubidium atom have? a. Rubidium has 86 neutrons, and the atomic mass is 37 b. Rubidium has 49 neutrons, and the atomic mass is 85. 5 c. Rubidium has 37 protons, 37 electrons, and the atomic mass is 85. 5
4. In the periodic table shown below, some elements are shaded. Based on its position in the periodic table, which element is the heaviest? a. helium (He) b. krypton (Kr)
5. From the choices displayed below, select the one that is an element and not a compound. a. Xe b. H 2 SO 4 c. Hg 2 Cl 2
6. Compare and contrast mixtures and compounds. a. Compare: Both contain reactants and products. Contrast: Mixtures-has chem reactions. Compounds-no chem reactions b. Compare: Both contain more than one type of substance Contrast: Mixtures-no chem reactions, Compounds-has chem reactions. c. Compare: Both contain matter made of atoms. Contrast: Compounds-no chem reactions, Mixtures-has chem reactions.
7. Physical changes result in a substance looking different without actually changing the atomic structure of the substance. On the other hand, during chemical changes the substance undergoes chemical reactions at the valence electron level. Which process below most likely produces a physical change, without a chemical change? a. A metal is exposed to water and becomes corroded. b. A solid is exposed to heat and transforms into a liquid. c. Two liquids are mixed together and a solid forms in the solution.
I Can… Use the periodic table to determine the properties of an element. TOC #1 Chapter 12 Directed Reading #2 Ch. 12 Section 1 Electrons and Chemical bonding Notes
1. Get with your same birthday month partner. 2. Finish and check answers for the Chapter 12 Directed Reading.
■ Chemical bonding is the joining of atoms to form new substances. ■ An interaction that holds two atoms together is called a chemical bond. When chemical bonds form, electrons are shared or transferred.
3 Types of Chemical Bonds (write at the bottom of your notes) ■ Ionic Bonds: atoms gain or lose an electron and form ions (metals & nonmetals) Na. Cl ■ Covalent Bonds: sharing electron pairs between 2 nonmetals ■ Metallic Bonds: attraction between closely packed metals.
■ The number of electrons in an atom can be determined from the atomic number of the element. ■ Electrons in an atom are organized in energy levels: 1 st – 2; 2 nd – 8; 3 rd – 18.
■ Valence electrons are the number of electrons on the outermost (last) energy level ■ You can use the periodic table to determine the number of valence electrons for atoms of some elements
The number of electrons in the valence level of an atom determine whether an atom will form bonds. ■ Atoms that have 8 electrons in their valence level do not usually form bonds. The outermost energy level is considered to be full if it contains 8 electrons.
■ An atom that has fewer than 8 valence electrons is more likely to form bonds than at atom that has 8 valence electrons is. Atoms bond by gaining & losing electrons or sharing electrons to have a filled outermost energy level.
Activity: Move around the room!
Different # Siblings Partner: 1. Which of the following atoms do not usually form bonds? Justify! a. Calcium b. Neon c. Hydrogen d. Oxygen 2. When bonding occurs, the joining of two atoms will form a _____________. 3. How can an atom that has 5 valence electrons achieve a full set of valence electrons? 4. Identify the number of valence electrons in a barium atom.
Check! 1. Which of the following atoms do not usually form bonds? a. Calcium b. Neon It’s a noble gas! c. Hydrogen d. Oxygen 2. When bonding occurs, the joining of two atoms will form a chemical bond or new substance. 3. How can an atom that has 5 valence electrons achieve a full set of valence electrons? They will share or gain 3 electrons. 4. Identify the number of valence electrons in a barium atom. A barium atom has 2 valence electrons.
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