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Chapter 2 W&C
Vocab Work
| Question | Answer |
|---|---|
| Proposition that early in Earth's history. | Chemical Evolution |
| A characteristic number of protons. | Atomic Number |
| Forms of elements with different numbers of neutrons (equal-place). | Isotopes |
| The sum of the protons and nuetrons in an atom is called? | Mass Number |
| What specific region around the atomic nuclei do the electrons move around ? | Orbital |
| Orbitals are grouped into levels called ? | Electron Shells |
| The electrons found in the valence shell is called? | Valence Electrons |
| The number of unpaired electrons in an atom is called? | Valence |
| What is a chemical bond? | It's stronge attractions that bind atoms together. |
| What bond results in the sharing of electrons? | Covalent Bond |
| Substances that are held together by covalent bond. | Molecules |
| Electrons that are shared equally with equal electronegavity. | Nonpolar Covalent Bonds |
| Electrons are transferred from one atom to another. | Ionic Bonds |
| What is a Ion? | An atom or mollecule that carries a charger. |
| Positively charged ions are? | Cations |
| Negatively charges ions are? | Anions |
| What indicates the numbers and types of atoms in a molecule? | Molecular Formula |
| What indicates atoms are bonded together? | Structural Formula |
| Chemical Reaction is? | A substance is combined with others and or broken down into a new substance. |
| What refers to the number 6.022 X 10^23? | Mole |
| The sum of the mass numbers of all the atoms in a molecule. | Molecular Weight |
| The number of moles of the substance present per liter of solution. | Molarity |
| An agent for getting substances into solution. | Solvent |
| The overall distribution of charge is asymmetrical. | Polar |
| Substances that interact with water. | Hydrophilic |
| Substances that do not intereact with water. | Hydrophobic |
| Cohesion | Binding between like molecules. |
| Adhesion | Binding between unlike molecules. |
| The resistance makes a water surface act as if it had an elastic membrance. | Surface Tension |
| The enegry required to change 1 gram of it from a liquid to gas. | Heat of vaporization |
| Substances that give up protons during chemical reactions and raise the hydrogen ion concentration of water. | Acids |
| Bases | Lower the hydrogen ion concentration of water. |
| compounds that minimize variation in pH. | Buffers |
| A resulting reaction is ? | A product |
| A dynamic but stable state is ? | Chemical Equilibrium |
| Liquid water molecules absorb enough heat, they transform the gascous state is ? | Endothermic |
Created by:
vargas2129
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