Elements
Hg
What is the only liquid metal element at room temperature?
in the Nucleus
Where are protons and neutrons located in the atom?
Boron and Silicon?
What are two examples of metalloids?
Germanium
What is a solid metalloid on family 14?
I2 , Br2 ....etc
What is a diatomic element?
These two elements are the only nonmetal gases at room temperature on period 1.
What is Hydrogen and Helium?
It is the sum of protons and neutrons.
How is mass number measured?
Bromine
What is a liquid non-metal at room temperature?
Iodine
What is a solid non-metal of family 17?
Na
What is an example of a mono-atomic element from family 1?
these two elements are liquid at room temperature
What is mercury and bromine?
represents the number of protons which is equal to the number of electrons.
What is the atomic number?
Hydrogen
What is a non-metal gas at room temperature located on period 1 and family 1?
Lithium
What is a solid metal at room temperature of family 1 and period 2?
one atom only
What is a monoatomic element?
only nonmetal on the left side of the periodic table
What is hydrogen?
The electrons.
What is outside the nucleus?
About 90% of the total elements are solids.
How much percentage of metals and metalloids are in the periodic table?
O, Ne, Ar
What are three non-metal gases at room temperature?
Made of two identical atoms
What is diatomic element or molecule?
these 10 elements' symbol DO NOT MATCH their name.
What are Lead, Tin, Iron, Sodium, Potassium, Antimony, Silver, Gold, Tungsten, Mercury have in common?
protons, electrons, and neutrons.
What are the three subatomic particles in the atom?
These elements are found as solids, liquid or gases at room temperature.
What type of state of matter can you find non-metals at room temperature?
Hg, Br
What are the only 2 liquid elements at room temperature?
It has a double bond?
How many bonds does O2 molecule or element have?