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Chapter 2
Matter
| Question | Answer |
|---|---|
| An atom that has more protons than electrons. | A positive ion. |
| Properties of matter that do not changed a substance into a new substance are what kind of properties | Physical |
| Define molecule | A group of atoms connected by covalent bonds. |
| Define matter | Anything that has mass and takes up space. |
| What happens to a liquid at its freezing point. | Water will turn from a liquid to a solid. |
| At what temperature does water freeze | 0* C or 32* F |
| What happens to a liquid at its boiling point? | Water will turn from a liquid to a gas with an increase in the movement of molecules. |
| At what temperature does water boil? | 100* C or 212* F |
| How can state of matter change? | Matter can change with the introduction of heat and or pressure. |
| Define isotope | Atoms of the same element that have different numbers of neutrons. |
| Define ionic bond | The bond between two ions formed through the transfer of one or more electrons. |
| Define ion. | Electrically charged atom whose charge results from an atom losing or gaining an electron. |
| Define covalent bonds | The bond formed by the sharing of a pair of electrons by two atoms. |
| Define physical property | Any property used to characterize matter and energy and their interactions. |
| Define chemical property | A property or characteristic of a substance that is observed during a reaction in which the chemical composition or identity of the substance is changed |
| Where are the electrons located? | Within the atomic cloud. Outside the nucleus. |
| Where are the neutrons located? | Within the nucleus of the atom |
| Where are the protons located? | Within the nucleus of the atom. |
| Define electrons. | A particle within the atomic cloud with a negative electric charge. |
| Define neutron | A particle within the nucleus of an atom with no charge. |
| Define proton | A particle within the nucleus of an atom with a positive electric charge. |
| Explain the difference between a compound and mixture. | A compound is a group of atoms from more than one type of element chemically combined, while a mixture is composed of two or more substances NOT chemically combined. |
| Explain how to find the number of electrons using the periodic table. | Number of electrons = Number of protons = Atomic number |
| Explain how to find the number of protons using the periodic table. | The number of protons are found by looking at the atomic number. |
| Explain how to find the number of neutrons using the periodic table. | The number of neutrons are figured by subtraction the atomic number from the atomic mass. |
| Define solution | A mixture which is evenly mixed throughout. |
| What is another word for solution | Homeogeneous mixture. |
| Define mixture | Composed of two or more substances that are not chemically combined and they retain their original properties. |
| How can a mixture be separated. | By physical means |
| Define compound | Atoms of more than one type of element that chemically bonded together. |
| How can a compound be separated? | Compounds cannot be separated by physical means and different properties then their original components do. |
| Explain how you would know if a substance is a plasma? | A substance related with extreme heat, takes the shape of the area. Molecules bounce extremely fast past each other. |
| Explain how you would know if a substance is a solid. | A substance that has a fixed size and shape. The molecules are tight together and allows only for them to only vibrate against each other and not change positions. |
| Explain how you would know if a substance is a gas. | A substance that takes the size and shape of the container. Molecules move fast and bounce off of each other. |
| Explain how you would know if a substance is a liquid? | An amount that takes the shape of the container and is fluid at room temperature. Molecules move fast and bounce off of each other and change positions. |
| The basic unit of matter | Atom |
| Particles without electric charge in the atom's nucleus. | Neutrons |
| The density of a substance is what kind of property. | Physical |
| Anything that has mass and takes up space | Matter |
| Particle located in an atom's nucleus. | Protons and Neutrons |
| H2O is a compound formed by sharing --- | electrons |
| How do you know if a substance is an isotope? | They have the same atomic number but different mass numbers. |
Created by:
jojones21
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