Vocabulary
Positively charged particles of an atom that are located in the nucleus.
What is a proton?
The atomic number determines
Who is protons and electrons?
All atoms of any given element have the same number of ________.
What is protons?
The elements in group 1 have ____ valence electrons.
What is 1 valence electron?
This element has the chemical symbol of C.
What is Carbon?
Identify how many groups and periods?
groups- 18 columns
periods- 7 rows
Where do the valence electrons belong?
What is the last energy level?
Which subatomic particle is found in the energy levels (shells)?
What are electrons?
The elements in each group have the same amount of
What is valence electrons?
Chemical symbol N .
What is Nitrogen?
The number of protons in an atom.
What is an atomic number?
The Bohr model for Iodine should have how many valence electrons and shells?
5 shells and 7 valence electrons
The periods help us identify the amount of what?
energy levels of the atom (shells)
In the Periodic Table it is categorized in only 3 ways.
What is metals, nonmetals and metalloids?
Hyphen form for Sodium?
What is Sodium-11?
Electrons that in the highest energy level of an atom of an element.
What are Valence electrons?
Who organized the periodic table by atomic number?
Who is Henry Moseley?
The maximum number of electrons that can occupy the 2nd shell of an atom
8
sequence (2,8,8,18)
The elements in group 18 are called ______ , have ___ valence electrons (except helium), and are useful because they do not ______ with other elements.
What are Noble Gases, 8 valence electrons, and react?
I have 3 valence electrons with 4 energy levels who am I?
What is gallium?
Atoms of an element with the same number of protons but different numbers of neutrons.
What are isotopes?
Niels Bohr created this model that is seen the most often today.
What is the Electron Cloud model?
(Bohr's model)
Halogens are located in group ___?
What is 17?
The Russian chemist and teacher who first grouped elements together in a table by their atomic mass was __________.
Who is Dmitri Mendeleev?
Nuclear form for Carbon
What is 12^C?