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Science
chapter 3 test
| mixture | both |
|---|---|
| Everything that surrounds you. | matter & energy |
| What is matter? | Anything that has mass and takes up space. |
| What is energy? | Anything that brings about change. |
| Energy can hold _______ together or break it apart. | matter |
| What makes up matter? | atoms |
| What is at an atoms center? | nucleus |
| Atoms contain ______ & ________ at their center. | protons & neutrons |
| _______ are around the center. | Electrons |
| Protons have a ______ charge. | positive |
| Neutrons have a ______ charge. | neutral |
| Electrons have a _____ charge. | negative |
| Electrons are the part of the atom that are involved in what? | chemical reactions |
| Atoms are mostly _______ space. | empty |
| Elements are made up of _____ kind of atom. | one |
| True/False: Elements can be broken down into simpler form by chemical reaction. | False |
| Elements are arranged in the _________ _______. | periodic table |
| The periodic table provides information about the elements ____, how many ________ it has, and its ______. | mas,proteins,symbol |
| Elements make up __________. | everything |
| Compounds are made up of two or more _________ in exact ___________. | elements, proportions. |
| Compounds have properties ________ from the elements they are made up of. | different |
| What are the two types of compounds? | 1. molecular compounds 2. ionic compounds |
| Molecular compounds for when different types of _____ share their outermost electrons. | atoms |
| What is the smallest part of a molecular compound? | molecule |
| What is a molecule? | A group of atoms held together by the energy of chemical bonds. |
| Ions are __________/__________ charged atoms. | positively/negatively |
| Why do atoms combine? | Because they have been positively or negatively charged. |
| Ions are usually _______. | neutral |
| What happens when an atom loses an electron? | The atom has more protons than electrons. It will be negatively charged. |
| How do ionic compounds form? | Ions of opposite charges attract one another to form electrically neutral compounds. |
| Ions transport _______ for your blood. | oxygen |
| What is a mixture? | A combination of substances which individual substances retain their own properties. |
| Mixtures can be ______, liquids, _____,or any ___________ of them. | solids, gases, combination |
| What are solutions? | two or more substances are mixed evenly |
| Solutions are ________. | mixtures |
| Most chemical reactions take place in mixtures called _________. | solutions |
| Suspensions are ________. | mixtures |
| Suspensions are formed when a liquid or ____ has another ________ evenly spread through it. | gas, substance |
| In a suspension substances do what? | sink to the bottom |
| What do organic compounds always contain? | carbon & hydrogen |
| What are carbohydrates | organic molecules that supply energy for cell processes |
| What are organic molecules? |
Created by:
lwiese
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