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8Sci_Elements

Elements, Molecules, Compounds & Mixtures

QuestionAnswer
Does a proton, neutron or electron have a negative charge? an electron
What two elements make up water? hydrogen and oxygen
What do orbitals contain? electrons
Which has a greater atomic mass, hydrogen or neon? neon
Is the nucleus of an atom always positively or negatively charged? positively
What is the chemical formula - 3 carbon atoms and 8 hydrogen atoms? C3H8
What is ozone (O3) an example of? molecule
How many different elements are in methane, CH4? two
What is an element? purest, simplest form of matter
What is salt an example of? a molecule, a compound and two elements chemically bonded
Which of the following is the heaviest - electron, proton, nucleus or neutron? nucleus
What is nitrogen an example of? an element
What would the chemical combination of Atom A with Atom B result in? molecule AB
What is Magnesium an example of? an element
What is steel an example of? a mixture
What is an example of a homogeneous mixture? air
How do elements combine to form a compound? in certain ratios
What is a heterogeneous mixture? it contains two or more substances that may or may not be easily distinguished
What is the ratio of the elements involved in methane, CH4? 1:4
The formula for glucose is C6H12O6. How many atoms are present in the glucose compound? 24
What is an example of a heterogeneous mixture? salad
What is a homogeneous mixture? it contains two or more substances that are not easily dintinguished
What are two examples of pure substances? oxygen and gold
What is the resulting compound when elements chemically combine? it contains different properties of elements before combination
What is the chemical symbol for Tin? Sn
How many neutrons does Argon have? 22
What series of activities would you use to separate sawdust, water and iron fillings? evaporation, then magnetic separation
What is the chemical symbol of the element BELOW Helium on the periodic table? Ne - Neon
How many electrons does Calcium have? 20
What are the four main ways to physically separate mixtures? 1 - sifting 2 - filtration 3 - evaporation 4 - magnetic separation
How would you use sifting to physically separate mixtures? it separates two solids by size ex: rocks out of soil
How would you use filtration to physically separate mixtures? it separates solid from liquid (heterogeneous mixture) ex: sand and water
How would you use evaporation to physically separate mixtures? it separates solid from liquid (homogeneous mixture) also called distillation ex: salt water
How would you use magnetic separation to physically separate mixtures? it separates materials based on magnetic properties ex: metal scraps from wood chips
Define, solvent. substance that dissolves ex: water
Define solute. substance that is dissolved ex: kool-aid, sugar
Why are carbon monoxide (CO) and carbon dioxide (CO2) different? because they have different amounts of atoms and ratios
Created by: ndmsteach