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Chemistry Review
| Question | Answer |
|---|---|
| where on the periodic table would you find elements that are most similar? | same family/group |
| Where are the most reactive metals located on the periodic table? | alkali metals |
| Where are most reactive non metals located on the periodic table? | halogens/ group 17 |
| List the elements that are liquid on the periodic table | mercury and bromine |
| Where are the transition metal found on the periodic table? | Group 3 -12 |
| Elements that are shiny, solid, conducts electricity, has atomic mass of 108 | metal |
| Elements in the same vertical column on the periodic table have similar | chemical properties |
| Where are the noble gases found? | Group 18 |
| The following is a glucose molecule: C6H12O6 How many atoms of each element? | 6 carbon 12 Hydrogen 6 oxygen |
| The following is a glucose molecule: C6H12O6 What are the elements in this compound? | carbon hydrogen oxygen |
| Lithium, sodium, potassium, rubidium, and cesium are all in same family. The means they have the similar ______________. | physical and chemical properties |
| What forms when molecules join together? | compound |
| What is formed when two hydrogen atoms and one oxygen atom react chemically to make water? | compound |
| The majority of the elements on the periodic table would be classified as ____________. | metals |
| Which is a homogeneous mixture: pizza, salad, chicken noodle soup, or salt water solution? | salt water solution |
| substance being dissovled | solute |
| substance that does the dissolving | solvent |
| Sodium (Na)and Chlorine (Cl) form sodium chloride (NaCl) which is also called | salt |
| Which elements belong to the same family as potassium (K) and sodium (Na? Fluorine (F), oxygen (O), or bromine (Br)? | Lithium (Li) |
| An unknown substance is malleable and ductile. Where would the sample most likely be found on the periodic table? | far left of the zig zag line |
| Where are most non-metals found on the periodic table? | far right of the zig zag line |
| Why are elements placed in the same column on the periodic table? | The have the same number of valence electrons on the outer energy shell. |
| Why are elements placed in the same period on the periodic table? | They have the same number of energy shell (rings). |
| How are elements arranged on the periodic table? | Increasing atomic number |
| In which group are most likely the highly reactive elements found? | Group 1 (alkali) and 17 (Halogens) |
| Which group on the periodic table contain elements with the most varied properties? | transitions |
| Which groups contains elements that are radioactive elements? | lanthanides and actinides |
| Elements that are man-made are called? | synthetic |
| 85 grams of Element A reacts with 175 grams of Element B to form how many grams of AB. | 260 grams of AB |
| What is the law of conservation of mass? | mass is not created or destroyed. It just changes forms. |
| What would be used in front of the elements to balance a chemical equation? | coefficients |
| What are the ingredients in a chemical equation? | reactants |
| These elements are semi-conductors and conduct electricity under certain conditions. | metalloids |
| Elements on the periodic table can be divided into three main groups called____________. | metals, metalloids, non-metals |
| The number above the symbol is called_________. | Atomic number |
| The number below the symbol is called_________. | Atomic mass |
| The atomic mass include all the _______ and _____ in the nucleus. | Protons, neutrons |
| Substances not chemically combined are called ________________. | Mixtures |
| Substances not chemically combined and can be easily separated are called_______________. | Heterogeneous mixtures |
| Sustances that are combine evenly are called __________. | Homogeneous mixtures |
| Pizza is an example of which kind of mixture? | Heterogeneous |
| Milk is an example of which kind of mixture? | Homogeneous (Solution) |
| If a student chemically combines 14g of hydrogen with 22g of oxygen, what will be the mass of the product? | 36grams |
| To make sure substances do not escape in a chemcial reaction,it must happen in a ___________ system. | closed |
| When gases are able to escape in a reaction, it have been completed in an ________ system. | open |
| How do you calculate the number of neutrons in an element? | Atomic mass- Atomic number= neutron |
| Elements with two electrons on the outer shell belong to _____________________. | Alkaline Earth Metals |
| Elements with their outer energy shell full belong to _________________________. | noble gases |
| How many atoms are represented in the formula CaCO3? | 5 atoms |
| When a substance in a closed system interact with one another, the total mass of the system _________________________. | remains the same |
| What does it mean when a symbol (Ca) has no subscript? | only one atom |
| How can you separate a water and sand mixture? | filtration |
| How can you separate saltwater? | distillation (evaporation) |
Created by:
scienceeagle
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