Never has an equal number of protons and electrons, and an atom always has an equal number of protons and electrons.
Always has the same number of protons and neutrons; for atoms the number of protons may be different than the number of neutrons.
Always has more electrons than protons; atoms always have the same number of protons as electrons.
Never has more than 1.5 times as many neutrons as protons; atoms may be radioactive.
Atom A and B have the same mass number
Atom A and atom B are different elements
Atom A and Atom B have the same mass
Both atom A and atom B are radioactive
Hydrogen, oxygen, nitrogen, and carbon (HONC)
Hydrogen, oxygen, calcium, and a fourth element he simply called "metal"
Unobtainium, element X, vibrainium, and adamantium
Air, wind, earth, and fire
Air, fire, earth, and water
The atom has a cubic shape with no space between atoms
The atom is mostly empty space.
Atoms are spherical and closely packed, with small amounts of space between atoms.
Atoms are shaped like thin donuts, with very large spaces, or holes, inside each one.
Electrons have no charge
Electrons have a positive charge
Electrons have a negative charge
Electrons can have either a positive or negative charge depending on their magnetic field.
Electrons have no mass
Electons travel in curved paths and are therefore waves of energy, not matter.
A genuine image of a molecule with visible bonds
A genuine image of a neutron visible within a carbon atom, where the nucleus is shown in black and the neutrons within it visible as a blue region
A genuine detailed image of an atom with a visible electron-rich region
A genuine of two atoms of hydrogen bonded together wih visible electrons between them.
Double pan balance
Flame ionization spectrometer
Primitive type of photography known as a daguerrotype
A nitrogen atom is stable. it will neither lose nor gain electrons
A nitrogen atom will gain three electrons
A nitrogen atom will lose three electrons
A nitrogen atom will gain six electrons to form three chemical bonds
A nitrogen atom will gain one electron
Helium is a noble gas with a full set of valence electrons and therefore will not form an ion.
Helium is far more likely to lose an electron and form a cation, rather than gain an electron and form an anion as shown
This ion is radioactive and would decompose so rapidly it cannot be observed
This is not an ion, it is an atom
The oxygen dianion, O2-
The carbon dication, C2+
This atom is chemically stable, not radioactive, and is unlikely to form an anion or a cation
This atom is chemically unstable, radioactive, and is likely to form an anion
This atom is chemically unstable, not radioactive, and is likely to form a cation
This atom is chemically unstable, not radioactive, and is likely to form an anion
This atom is chemically stable, and is radioactvie
This atom does not exist since none of the electrons are in the nucleus.
Because beryllium is likely to lose two electrons, and oxygen is likely to gain two electrons
Because beryllium is likely to gain one electron and oxygen is likely to lose one electron
Because beryllium is likelty to gain two electrons, and oxygen is likely to lose two electrons
Because beryllium has four valence electrons and oxygen has 8 valence electrons
Because beryllium oxide has no valence electrons
The sodium cation and magnesium
The oxygen dianion and carbon
Neon and argon
The magnesium dication and neon
Hydrogen and seaborgium
Scandium, atomic number 21
Iron, atomic number 26
Lutetium, atomic number 71
Silicon, atomic number 14