The mass number and identity for an atom composed of 17 protons, 20 neutrons and 17 electrons would be

The isotope lead-208 contains
126 neutrons

The mass number and identity for an atom composed of 17 protons, 20 neutrons and 17 electrons would be
37, chlorine

How many valence electrons does an arsenic (As) atom have?
5

In shorthand notation, the electron configuration for a calcium atom would be:
2.8.8.2

The atomic mass listed next to each element on the periodic table is the:
average atomic mass based on the relative natural abundance of the isotopes of the element

How many protons are there in an atom of uranium-238?
92

An alpha particle is identical to
a helium-4 nucleus

During beta decay
a neutron turns into a proton

Iodine-131 has a half-life of 8 days. How much of a 10 gram sample remains after 16 days?
2.5 grams

During alpha emission, the mass number of the radioactive isotope
decreases by 4

When a radioactive nucleus transforms spontaneously to a new, different nucleus and emits radiation, the process is called
transmutation

An ionic bond is usually formed between
a metal and a nonmetal

In a molecule of the diatomic element nitrogen (N2), what type of bond exists between the two nitrogen atoms?
a triple covalent bond

In a double bond, two atoms share a total of ______ electrons.
4

Dalton was absolutely correct in his statement that all atoms of the same element are identical.
False

Nuclei are held together by electrical forces.
False

The charge on a stable aluminum (Al) ion would be negative three (3-).
False

The electron configuration for a Si atom would be written as 2.8.8.4.
False

The number of protons is always equal to the number of electrons for any given atom.
True

Compounds must always overall be neutral in charge.
True