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B
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100
When you cool a solvent, its solubility of a solution is: a)increased b)decreased c)the same d)none of the above
What is b)decreased
100
Which of these is a compound? a)Water b)Coffee c)Salad d)Soup
What is a) Water (H20)
100
Nonmetals are poor __________ of heat. a)insulators b)conductors c)keepers d)protons
What is b)conductors
100
___________ form a zigzag line on the periodic table. a)Nonmetals b)Solids c)Metals d)None of the above
What is d)None of the above = metalloids!!
100
Metals are located where on the periodic table? a)Left side. b)Right side. c)Top half. d)Bottom half.
What is: a)Left side.
200
T/F: Using a magnet makes separating iron filings from a mixture harder.
What is:False - easier, not harder.
200
T/F: Dilution is the amount of solute dissolved in a solvent.
What is: False - Concentration!
200
T/F: A proton cloud contains electrons and a lot of empty space.
What is: False - ELECTRON cloud :)
200
T/F: If the pH is between 3 and 4, it is a base.
What is: False - acid
200
T/F: A pure substance with six protons in the nucleus can be identified as having a positive charge.
What is: False - A pure substance with six protons in the nucleus can be identified as... a specific element.
300
The atomic number indicates how many ________ an element has in its nucleus.
What is protons.
300
___________ have no charge.
What is neutrons
300
Elements with similar properties are found where on the periodic table?
What is: in columns (vertically/up and down), in families or groups...etc
300
J.J. Thompson is credited for proposing the _________ plum pudding model of an atom.
What is electron.
300
Which - an acid or a base - will react strongly with a metal to form a new chemical?
What is an acid.
400
John Dalton proved atoms existed by using scientific ___________.
What is experiementation
400
On the pH scale, what number is in the middle that indicates that the substance being tested is neutral?
What is 7.
400
Do elements that are arranged in rows (horizontally) have many similar properties on the periodic table? Explain how you know this.
What is No, I know this because elements that are arranged in columns have similar properties, therefore the rows aren't arranged by similarities also.
400
Which - neutrons, protons, or electrons - have 1) no charge? 2) a negative charge? and 3) a positive charge?
What is 1)neutron 2)electron 3)proton
400
Along the zigzag on the periodic table there is one element that is not actually a metalloid. What is this element?
What is aluminum.
500
Describe a compound and give two examples.
What is: A compound is 2 or more substances chemically combined to form a new substance. Ex) Water, Salt, ...etc.
500
Describe a mixture and give two examples.
What is: A mixture is two or more substances not chemically combined to form a new substance. Rather they are just mixed together. EX) Chicken and Noodle soup (yum)/Coffee/Tossed Veggie Salad...etc.
500
Explain how a mixture and a compound are different.
What is: A mixture is made up of substances that are not chemically combined -- a compound is made up of chemically combined substances that form a NEW substance (:
500
Name two ways that elements are organized on the periodic table.
What is 1)Organized by state of matter at room temperature (solid,liquid,gas). 2)Organized by similar properties in columns (vertical){families/groups}. 3)Organized in ascending (increasing) atomic number from left to right. 4)Organized by metals, metalloids, and nonmetals (left,middle,right). etc....
500
Identify the solute and solvent in a glass of lemonade. Then explain how you know. Water=_________//Powdered drink mix=___________.
What is: Water=solvent (The substance that the solute is dissolved in). Powdered drink mix=solute (The substance that dissolves). <---Inside parenthesis explains how I know this. :)
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