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WorksheetsAtoms, elements and compounds
Total questions: 14
Worksheet time: 8mins
electronic structure of calcium is 2,8,8,2. What is the position of Calcium in the periodic table?
period 4, group 4
period 4, group 2
period 2, group 4
period 2, group 2
Sugar water is a
compound
mixture
element
molecule
What is the total number of electrons in one molecule of ammonia, NH3
8
9
10
11
Compound made of Na and Cl is
metallic compound
covalent compound
ionic compound
Atomic number of K is 19, which statement describes the bonding in the compound formed?
each K gives 1 electron
each K gains 1 electron
each K gives 2 electrons
each K gains 2 electrons
To form an ionic compound, each chlorine atom gains 1 electron to form
cation
anion
element
compound
Where is a metal structure model?
In MgCl2 compound,
each Mg gives 2 electrons
each Cl gains 1 electron
each Cl gives 1 electron
each Mg gains 2 electrons
choose the right characteristics when talking about graphite
can conduct electricity
used as a lubricant
very high melting point
4 bonds
Which substance is a macromolecule?
water
copper
silicon oxide
sodium chloride
Metals are malleable because
Layers of positive ions can slide over one another and take up different positions
There are free electrons available to move and carry charge
There are many strong metallic bonds in giant metallic structure
There are a lot of free electrons in their struture
An use of Radioactive Isotopes
used in cancer treatment
used in alloys
used in wastewater treatment
used in produce steel
How many neutrons in a 2963Cu atom?
34
24
29
63
Choose a correct statement about isotopes:
having the same number of neutrons
having the different number of elctrons
having the different number of protons
having different number of neutrons
