Building Blocks Of Matter- Biology Flashcards
The atom is neutrally charged because of…
The protons and electrons.
How many naturally occurring elements are there?
92.
Atoms are distinguished by…
The number of protons in their nuclei.
An atoms that contains a higher or lower number of neutrons than usual is called…
An isotope.
Carbon usually has 6 neutrons and 6 protons. This would be referred to carbon 12. But 7 or 8 neutrons would be referred to as…
Carbon 13 or carbon 14
Isotopes do not have a charge because…
The number of positively and negatively charged particles is the same.
Ions are:
Atoms that lack or have extra electrons.
Atoms combine with each other in chemical reactions to make:
Molecules, which are defined as having there own unique physical and chemical properties different than there constituent elements.
Molecules like water containing more than one type of element is called a:
Compound
A hydrogen molecule cannot be called a compound because:
It has two hydrogen molecules, instead of two different elements.
Break down the script H2O.
Numbers (usually in subscript) are written to the right of the letter to represent the number of atoms present per compound.
The connections between atoms are called…
A chemical bond.
