Elements and Atoms
What cannot be broken down further into simpler substances by chemical means?
Chemical Elements
Atoms are mostly "blank"
Empty space
Isotopes are the same element but with different "blank"
Mass number
The composition of each "blank" can then be found out.
isotopes
In the electron shells for the first 20 elements, the number of electrons increases by how much each time.
1
What cannot be broken down into simpler substances by chemical means?
Chemical Elements
Atoms consist of three things, which of these has no charge
Neutrons
In what way can we recognize an atom
By seeing the number of protons in it
In what way is the relative abundance shown
percentage
Protons and neutrons form the nucleus, so are called "blank"
Nucleons
What's a substance made up of 2 or more elements where atoms are not chemically bonded.
Solution
They are known for whizzing around the nucleus in orbits
Electrons
This type of isotope is unstable due to the imbalance of neutrons and protons.
Radioactive isotope
What will deflect the stream of ions in the mass spectrometer
Magnetic field
The mass of the electron is
Negligible
Chemical elements contain one type of "blank"
Atoms
Both protons and "blank" have the same mass
Neutrons
How many isotopes does hydrogen have
3
In a mass spectrometry chart, what is shown on the vertical axes?
Relative abundance
This is the number of protons in the atom.
Atomic number
You can separate them by physical means
Heterogeneous mixtures
If we add all the charges across an atom, what number do we get
0
What radioactive isotope is used as fuel for controlled fission reactions in nuclear power plants.
uranium-235
What does the period number tell us about an element?
The number of outer shells