Section 1: Atoms, Bonding, and the Periodic Table - ppt video online download
atoms and periodic table review answer key. Wed, 17 Why do atoms bond? For each element, draw Mon, 29 Oct Whiteboard Created Date: radioactive C â€“ 14 is: to reinforce and review the. Valence Electrons and Bonding The number of valence electrons in an atom of an element determines many properties of What does the periodic table tell you about the atoms of elements? A carbon dioxide molecule is a nonpolar molecule because of its straight-line shape. Chemical Interactions Chapter 2 Review. Atoms/Bohr Model Reinforcement Chapter 10 Review: Atomic Structure and Periodic Table Notes: Chemical Bonds . Cartoon: Radioactive Decay. Story of .
When ionic compounds are dissolved in water, the bonds between ions are broken, allowing the ions to move freely and conduct electricity. Atoms and Bonding 5.
5.1 Atoms, Bonding and the Periodic Table Guided reading and
How do covalent bonds form? Covalent bonds form when two atoms share electrons. What are molecular compounds? Molecular compounds are compounds that consist of molecules bonded with covalent bonds. How does unequal sharing of electrons affect the atoms in molecular compounds? Unequal sharing of electrons causes the bonded atoms to have slight electrical charges. A chemical bond formed when two atoms share electrons 2.
Atoms of some elements in a molecular compound pull more strongly on shared electrons than do atoms of other elements. As a result, the electrons are pulled more toward one atom, causing the bonded atoms to have slight electrical charges. If two atoms pull on shared electrons with equal strength in opposite directions, the polar bonds cancel each other out.
Because polar molecules attract each other much more than nonpolar molecules do Oil molecules are nonpolar, so they are not attracted to the polar water molecules, which are attracted more strongly to each other than to the molecules of oil.Elements and atoms - Atoms, compounds, and ions - Chemistry - Khan Academy
Detergent causes the dirt and water to mix, because detergent molecules have a nonpolar end that is attracted to oil molecules and a polar end that is attracted to water molecules 5.
Some students may describe ductility and malleability simply as the ability to change shape. Ability to conduct heat, ability to conduct electricity, ability to change shape easily, luster 3.
Stainless steel; as strong as iron but will not react with air and water as iron does; can be used to make tools 4. Accept any correct examples of uses given for each property. Arrange the bars in order of increasing melting point. Describe what your graph reveals about the melting points of molecular compounds compared to those of ionic compounds. Melting points of molecular compounds are lower than those of ionic compounds. How can you account for the differences in melting points between molecular compounds and ionic compounds?
Molecular compounds have weak attractive force between molecules compared to those between ions, so less energy is needed to melt molecular compounds. How do the boiling points of the molecular and ionic compounds compare? Boiling points of molecular compounds are lower than those of ionic compounds.
Atoms, Bonding and the Periodic Table Guided reading and
Is ammonia a molecular compound or an ionic compound? Ammonia is a molecular compound because it has relatively low melting and boiling points. In hydrogen fluoride, fluorine attracts electrons more strongly than hydrogen does, so the bond formed is polar. In contrast, a water molecule is a polar molecule because of its bent shape.
Covalent Bonds 25 Section 4: Bonding in Metals How do the properties of metals and alloys compare? How do metal atoms combine? How does metallic bonding result in useful properties of metals? Bonding in Metals Download ppt "Section 1: Atoms, Bonding, and the Periodic Table" Similar presentations.