Counting Atoms
How many atoms of Calcium (Ca) are their in Limestone?
CaCO3
1
...means the metal can be drawn out into thin wire
Ductile
This is what Mendeleev is known for?
Discovering the pattern in elements that created the Periodic table.
The Element represented by the symbol "C" and is one of the most common elements
Carbon
What state (solid,liquid, gas) is Oxygen?
Gas
How many Magnesium(Mg) atoms are their in Magnesium Hydroxide?
Mg(OH)2
1
....means the metal can be hammered flat into thin sheets
Malleable
Mendeleev designed a periodic table in which elements were arranged in increasing atomic ______
Mass
The elements on both sides of the zig zag line are called...
Metalloids
What element has the atomic number 26?
Iron Fe
How many Chlorine atoms in Moth Crystals?
C6H4Cl2
2
Horizontal rows on the periodic table are called...
periods
How did Mendeleev predict the existence of undiscovered elements?
By using the pattern he discovered among the elements.
The elemental symbol is represented by a....
Capital letter
What is the Atomic Number of Gallium (Ga)
31
how many hydrogen (H) atoms are their in Calcium dihydrogen phosphate?
Ca(H2PO4)2
4
Columns on the Periodic Table are called
Groups or families
What important pattern did he discover? (Hint: this is the pattern according to the number of valences)
1,2,3,4,3,2,1
Where is the atomic number located on a square of an element?
on the top
What is the atomic Mass of Helium
4.0026
how many Oxygen atoms are their in Cellulose?
C6H7O2(OH)3
5
...States that the physical and chemical properties of the elements are periodic functions of their atomic numbers
Periodic Law
What was Mendeleev's first name?
Dmitri
Where is the atomic mass located on a square of an element?
On the bottom
What element is directly to the left of Gold (Au)
Platinum (Pt)