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WorksheetsChemical/physical changes/metals
Total questions: 16
Worksheet time: 8mins
ALL Elements and ALL Compounds are
able to be broken down
Chemical Formulas
Chemical Symbols
Pure Substances
Choose the BEST and COMPLETE Answer to describe What an Element is.
Made of one type of atom and a pure substance
Made of one type of atom and cannot be broken down
Made of one type of atom, pure substance, cannot be broken down, is represented by a chemical Symbol on the Periodic Table of Elements.
Made of one type of atom and is a pure substance and is shown on the Periodic Table of Elements.
Which answer is the BEST. All are partly correct. The question is what are the characteristics of a compound?
Compounds are pure substances.
Compounds are pure substances and can be broken down. Compounds are shown on the Periodic Table of Elements.
Compounds CAN be broken down, are composed of two or more elements, are NOT SHOWN on the Periodic Table of Elements, are represented by a Chemical Formula and are Pure substances.
Compounds are the same as elements in that both can be broken down.
Chemical changes show the following--choose the MOST COMPLETE ANSWER.
Form a new substance, cannot be reversed, mass of the object will decrease.
Form a new substance, cannot be reversed, mass of the object will decrease, energy change will be large.
Form a new substance, cannot be reversed, mass of the object will increase, energy change will be small.
Form a new substance, cannot be reversed, mass of the object will decrease, energy change will be small.
Differences between a chemical change and a physical change are
The amount of mass left after a chemical change is smaller. The amount of mass left after a physical change remains the same.
The amount of mass left after a chemical change is smaller than after a physical change AND a chemical change the energy change is large.
A physical change is cutting, bending, tearing and a Chemical change could involve fire, high temperatures, or color changes or a new smell.
All of the above answers are true.
Do we eat and breath some elements, compounds, and chemical changes?
Yes, because we eat cookies, salt, and breathe oxygen and drink H20. O is an element and cookies, salt, and H20 are compounds.
No, we do not eat these things.
Yes, because we eat chemicals and elements and compounds are chemicals.
The correct choice is both number 1 and number 3.
What are the most common Elements found on Earth?
O, H, Mg, Si
O, C, H, N
H, C, H20 and SALT
H20, S, N
What are all the ways a physical change can occur?
Freezing, steam, evaporation, change shape, bending, crushing, chopping, melting, drying clothes, eating metal
A New Substance forms
Mass decreases, new substance formed, chopping, evaporating
None of these show evidence of a physical change
Which choice shows evidence of a chemical change occuring?
Mass is decreased, chopping
Mass is decreased, new substance formed, large expenditure of energy, irreversible, gas bubbles, color change, smell.
Chopping, evaporating, cutting, crunching, bending, tearing, freezing, melting, steam rising.
None of these show evidence of Chemical Changes
Which is represented by a Chemical Symbol--compounds or elements?
Compounds
Both Compounds and Elements
Only Elements
Mixtures
A chemical formula means a chemical reaction has occurred?
Yes, for example when Na (a soft metal) and Cl ( a green gas) combine--they are a compound--which is a new substance.
No, a new substance can form from a mixture (such as fruit salad or rocks and sand)
A chemical formula is for Compounds meaning a chemical change has occurred because the definition of compound is two or more elements chemically combining.
The first choice and the third choice are correct
What does chopping, melting, crushing, breaking glass, ripping up paper and getting paper or clothing wet mean?
Chemical changes
Chemical and physical changes
Physical changes only
Both the first and the second answer are correct.
Shiny, good conductor of heat, and bendable or malleable means which of the following?
These are characteristics of Metalloids.
These are characteristic of both Metals and Metalloids
These are characteristic of Metals only
These are characteristics of Non-Metals
What group in the Periodic Table has these attributes:
Shiny or (metallic-luster), Semi-Conductor of Electricity, and Brittle
Non-Metals
Metalloids
Metals
None of these answers
The group of elements that are very poor conductors of electricity are classified as which group below?
Metalloids
Metals and Non-metals
Non-metals and Metalloids
Non-metals only
The group of elements that are very poor conductors of electricity are classified as which group below?
Metalloids
Metals and Non-metals
Non-metals and Metalloids
Non-metals only
