If only an element’s atomic number and weight are provided, what other atomic information can be determined for a neutral atom?(1 point)
Responses
only the valence electrons
only the valence electrons
only the number of protons and electrons
only the number of protons and electrons
the number of protons, electrons and neutrons
the number of protons, electrons and neutrons
only the number of protons and neutrons
the number of protons, electrons and neutrons
What quality differentiates hydrogen (H) from the other elements in group 1, the alkali metals?(1 point)
Responses
It is found by itself in nature.
It is found by itself in nature.
It has more than one valence electron.
It has more than one valence electron.
It is not very reactive.
It is not very reactive.
It is a non-metal.
It is found by itself in nature.
On which atomic property proposed by Henry Moseley is the current periodic table of the elements based?(1 point)
Responses
electric charge
electric charge
nucleus size
nucleus size
atomic weight
atomic weight
atomic number
atomic number
Which incorrect aspect of Rutherford’s model was fixed by Bohr’s model?(1 point)
Responses
Atoms have small, dense, positively charged nuclei.
Atoms have small, dense, positively charged nuclei.
Electrons move freely in curved paths around the nucleus.
Electrons move freely in curved paths around the nucleus.
The nucleus contains most of the mass of an atom.
The nucleus contains most of the mass of an atom.
Positively charged nuclei repel positively charged alpha particles.
Electrons move freely in curved paths around the nucleus.
You plan to pass alpha particles through a field that contains a consistent type of particle. Which configuration will result in the largest deflection of alpha particles? (1 point)
Responses
high-energy alpha particles passing through a field of low mass-number-particles
high-energy alpha particles passing through a field of low mass-number-particles
high-energy alpha particles passing through a field of high mass-number-particles
high-energy alpha particles passing through a field of high mass-number-particles
low-energy alpha particles passing through a field of low mass-number-particles
low-energy alpha particles passing through a field of low mass-number-particles
low-energy alpha particles passing through a field of high mass-number-particles
high-energy alpha particles passing through a field of low mass-number-particles
Which statement about metals and nonmetals is correct?(1 point)
Responses
Most metals are a solid under normal conditions, and most nonmetals are a liquid.
Most metals are a solid under normal conditions, and most nonmetals are a liquid.
Metals tend to be poor conductors of electricity, while nonmetals are strong conductors of electricity.
Metals tend to be poor conductors of electricity, while nonmetals are strong conductors of electricity.
Metals can be hammered into thin sheets, and nonmetals are brittle.
Metals can be hammered into thin sheets, and nonmetals are brittle.
Metals and nonmetals can both be found in any column of the periodic table.