Link to simulation: https://phet.colorado.edu/sims/html/build-an-atom/latest/build-an-atom_en.html
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Why is the H atom neutral (no charge)? Select all that are true
there is the same number of protons and electrons
there is the same number of positive and negative charges
there is 1 proton
there is 1 electron
What changed when you added 1 neutron to the H atom model?
Element Symbol
Net Charge
Mass Number
What changed when you added 1 more electron to the H atom model?
Element Symbol
Net Charge
Mass Number
What changed when you added 1 more proton to the H atom model? (choose all that apply)
Element Symbol
Net Charge
Mass Number
Changing each particle makes... (Move around the particles on the left column so that it matches what happens when that particle changes)
Add/Remove Neutrons
A new element forms
Add/Remove Electrons
Same element with a different mass
Add/Remove Protons
Forms a charge/ion of the same element
Move the choice to each category that makes the statement true
Electrons
Protons
Neutrons
Atomic Number is the number of __________.
Mass Number is the number of protons + _______________.
An ion (charge) forms when __________ are added or removed from the atom.
Choose all that are true
Atoms 8 and 9 have the same number of protons
Atoms 8 and 9 have the same number of nuetrons
Atoms 8 and 9 have the same number of electrons
Atoms 8 and 9 have different numbers of protons.
Atoms 8 and 9 have different numbers of neutrons.
Atoms 8 and 9 have different numbers of electrons.
Atoms 8 and 9 have the same mass number and atomic number
Atoms 8 and 9 have different atomic numbers and mass numbers
Atoms 8 and 9 have the same charge
Atoms 8 and 9 have different charges
Why is atom 9 a positive cation?Were electrons gained or lost in order to form the ion?
gained electrons
lost electrons
How would you build a negative ion (anion) for atom 12? Would you need to lose or gain electrons?
lose electrons
gain electrons
The TOP NUMBER in the symbol notation for an atom represents the atom's ________________
atomic number
mass number
The BOTTOM NUMBER in the symbol notation for an atom represents the atom's ________________
mass number
atomic number
A POSITIVE ION is called a ____________________ (cation, ion) and occurs when an atom ______________ (loses, gains) electrons. Choose the two correct terms to fill in blanks
cation
anion
loses
gains
A NEGATIVE ION is called a ____________________ (cation, ion) and occurs when an atom ______________ (loses, gains) electrons. Choose the two correct terms to fill in blanks
cation
anion
loses
gains
An ISOTOPE occurs when an element has a different ____________ (atomic number, mass number) because the number of _______________ (protons, neutrons, electrons) are different. Choose the two correct terms to fill in blanks
atomic number
mass number
protons
neutrons
electrons
What is the valence shell (outermost shell) for Mg?
first
second
third
fourth
What is the valence shell (outermost shell) for Mg +2?
first
second
third
fourth
Compare the number of valence electrons in Mg vs. Mg+2. Choose all that are true.
Mg has 2 valence electrons while Mg+2 has 8 valence electrons
Mg's valence shell is considered full or stable
Mg +2's valence shell is considered full or stable
Use the valence electrons to explain why Mg+2 is more stable than Mg.
Mg+2 only has 2 shells and the valence is full with 8 electrons
Mg+2 only has 2 shells and the valence is full with 2 electrons
Mg+2 has less electrons than Mg
Mg+2 has more electrons than Mg
Metals such as Magnesium (Mg) easily _________(lose, gain) __________(protons, neutrons, electrons) to fill their valence shell and become __________ (stable, unstable). Choose the three correct terms to fill in blanks
lose
gain
protons
neutrons
electrons
stable
unstable
Nonmetals such as Fluorine (F) easily _________(lose, gain) __________(protons, neutrons, electrons) to fill their valence shell and become __________ (stable, unstable). Choose the three correct terms to fill in blanks
lose
gain
protons
neutrons
electrons
stable
unstable
Noble gases such as Helium (He) and Argon (Ar) in group 18 on the periodic table do not form__________(ions, isotopes) because they have the maximum number of valence electrons and are _________ (stable, unstable) as a _________ (neutral, charged) atom. Choose the three correct terms to fill in blanks