atoms
are two atoms from the same element identical
no
what is the atomic number for Helium
2
how many hydrogen atoms are in a singular oxygen atom
2
What happens when sodium and chlorine atoms form sodium chloride?
they form a iconic bond
does an atom have a color
no
who created the periodic table
dmitri medeleev
How many oxygen atoms are there in a single water molecule
1
what is a covalent bond
a bond formed when two atoms share a pair of electrons.
does the electron move at all in the atom
does move as vibrations
what are the horizontal rows called
periods
yes
Which of the following compound will show the maximum covalent character
Aluminium Chloride
do atoms actually ever touch other atoms
no, not until they overlap
what are the vertical rows called
groups
what is waters melting point in celsius
0 degrees
State what will happen during the formation of a chemical bond
Decrease in energy
are there nuclear reactions going on in our bodies caused by atoms
yes
why is it called the periodic table
because of how the elements are arranged
the color of an atom depends on what?
the atomic structure and composition
Molecules are held together in a crystal by
Van der Waal's attraction