100 points
What is an atom?
Smallest unit of matter
Where are neutrons found in an atom ?
found in the nucleus alongside protons
How are elements arranged on the period table
arranged by increasing atomic number
What is the atomic number ?
number of protons in an atoms nucleus
What is the difference of a cation and an anion
cation is positively charged and anion is negatively charged.
What are the three main parts of an atom ?
Protons, neutrons and electrons
What determines the element of an atom ?
The number of protons in the nucleus.
What do we call atoms of the same element with different numbers of neutrons
Called isotopes
What is the mass number of an atom?
total of protons and neutrons
What is electronegativity ?
ability of an atom to attract electrons in a chemical bond
Where are protons found in an atom ?
In the nucleus
What is center of an atom called ?
called the nucleus
What is a molecule
two or more atoms bonded together
What happens if an atom gains or loses an electron ?
becomes an ion
Are two atoms of the same element identical?
No
What charge does a proton have ?
has a positive charge
What is the simplest atom ?
Hydrogen
What is the most common element in the universe?
Hydrogen
What is ion
an atom that has lost one or more electrons
Does an atom have a color?
No they do not have color
What charge does an electron have ?
Has a negative charge
What holds the nucleus together ?
The strong nuclear force
Can atoms be seen with a regular microscope ?
no
What do you call the different types of atoms in the periodic table
elements
Why don't metals burn?
most atoms in a solid chunk of metal don't have access to oxygen atoms