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As the elements with atomic numbers 11 through 17 are considered in order of increasing atomic number, the classification of the elements changes from
chemically combined in a fixed proportion
different molecular structures and different properties
19
metal to metalloid to nonmetal
The isotopes contain a different number of neutrons but have the same atomic number.
chemical reactivity
in orbitals
Atoms are hard, indivisible spheres of different sizes.
According to the wave-mechanical model, in the ground state, the 10 electrons of a neon atom would be located
chemically combined in a fixed proportion
different molecular structures and different properties
19
metal to metalloid to nonmetal
The isotopes contain a different number of neutrons but have the same atomic number.
chemical reactivity
in orbitals
Atoms are hard, indivisible spheres of different sizes.
Which statement describes two different isotopes of carbon?
chemically combined in a fixed proportion
different molecular structures and different properties
19
metal to metalloid to nonmetal
The isotopes contain a different number of neutrons but have the same atomic number.
chemical reactivity
in orbitals
Atoms are hard, indivisible spheres of different sizes.
Two gaseous forms of oxygen are diatomic oxygen, O2, and ozone, O3. These two forms of oxygen have
chemically combined in a fixed proportion
different molecular structures and different properties
19
metal to metalloid to nonmetal
The isotopes contain a different number of neutrons but have the same atomic number.
chemical reactivity
in orbitals
Atoms are hard, indivisible spheres of different sizes.
At STP, which property can be used to differentiate one-mole samples of Cl2(g) and Kr(g)?
chemically combined in a fixed proportion
different molecular structures and different properties
19
metal to metalloid to nonmetal
The isotopes contain a different number of neutrons but have the same atomic number.
chemical reactivity
in orbitals
Atoms are hard, indivisible spheres of different sizes.
A compound consists of two or more different elements that are
chemically combined in a fixed proportion
different molecular structures and different properties
19
metal to metalloid to nonmetal
The isotopes contain a different number of neutrons but have the same atomic number.
chemical reactivity
in orbitals
Atoms are hard, indivisible spheres of different sizes.
An element that is a very reactive metal could have an atomic number of
chemically combined in a fixed proportion
different molecular structures and different properties
19
metal to metalloid to nonmetal
The isotopes contain a different number of neutrons but have the same atomic number.
chemical reactivity
in orbitals
Atoms are hard, indivisible spheres of different sizes.
Which proposal in the development of the modern model of the atom was made before the others?
chemically combined in a fixed proportion
different molecular structures and different properties
19
metal to metalloid to nonmetal
The isotopes contain a different number of neutrons but have the same atomic number.
chemical reactivity
in orbitals
Atoms are hard, indivisible spheres of different sizes.
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