Unit 2 - Atoms and Periodic Table Review

The diagram below is the Bohr model of an atom.

Which best describes this atom?

• It has 6 electrons.

• It has a positive charge.

• It has 6 valence electrons.

• It has a full outermost energy level.

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The tiny, negatively charged particles are

• nucleus

• protons

• electrons

• neutrons

Which element contains the most ionization energy?

• Sodium

• Silicon

• Sulfur

• Selenium

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Which element has the smallest atomic radius?

• Cesium

• Cobalt

• Aluminum

• Neon

The central portion of an atom is called the

• nucleus

• shell

• electron

• ring

In a neutral atom, the number of electrons is

• equal to the number of neutrons

• greater than the number of protons

• less than the number of protons

• equal to the number of protons

Atoms of the same element that differ slightly in neutron number are called

• neutrons

• ions

• isotopes

• positrons

Which category of elements are more likely to accept electrons?

• Metals

• Nonmetals

• Metalloids

Of the following, the particle generally not found in the nucleus of an atom is

• a hyperon

• a meson

• an electron

• a muon

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Is this atom neutral or an ion?

• Neutral

• ion

• Not enough information

Tags

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