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Atomic Structure Questions - All Grades

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Grade 9 Atomic Structure
Which subatomic particle is NOT found in the nucleus of an atom?
  1. proton
  2. neutron
  3. electron
  4. ion
Grade 10 Atomic Structure
Which of the following atoms has the fewest electrons?
  1. 12753I
  2. 12852Te
  3. 12351Sb
  4. 12150Sn
Grade 9 Atomic Structure
The central part of the atom is called the                .
  1. nucleous
  2. nucleus
  3. neutron
  4. nuclear
Grade 11 Atomic Structure
What is true about the following element?
Electron-Dot Diagram - Aluminum
  1. It gains 3 valence electrons to form an ion.
  2. It loses 5 valence electrons to form an ion.
  3. It loses 3 valence electrons to form an ion.
  4. It gains 5 valence electrons to form an ion.
Grade 7 Atomic Structure
Protons have a                 charge.
  1. negative
  2. positive
  3. neutral
Grade 10 Atomic Structure
How many neutrons are present in the atom shown below?
  1. 21
  2. 24
  3. 45
  4. 66
Grade 11 Atomic Structure

This question is a part of a group with common instructions. View group »

Which represents a correct electron configuration for a chlorine atom?
  1. [Ar]4s23d104p4
  2. [Ne]3s23p6
  3. [Ne]3s23p5
  4. [Ne]3s23p4
Grade 10 Atomic Structure
An atom consists of what key, primary components?
  1. ions, protons, electrons
  2. protons, electrons, molecules
  3. protons, electrons, neutrons
  4. elements, neutron protons
Grade 6 Atomic Structure
What is a proton?
  1. A subatomic particle with no charge
  2. A subatomic particle with a negative charge
  3. A subatomic particle that has melted
  4. A subatomic particle with a positive charge
Grade 6 Atomic Structure
The atom's center, or nucleus, usually has both                    and                   .
  1. neutrons; atoms
  2. electrons; protons
  3. neutrons; protons
  4. oxygen; water
Grade 5 Atomic Structure
                is the smallest unit of matter.
  1. An atom
  2. An electron
  3. A neutron
  4. A proton
Grade 6 Atomic Structure
The area where electrons are found in an atom is called the
  1. electron orbit.
  2. electron field.
  3. electron cloud.
  4. electron atmosphere.
Grade 10 Atomic Structure
Which of the following pairs shows isotopes of the same element?
  1. 126Cand126C
  2. 146Cand147N
  3. 146Cand126C
  4. 146Cand146C-4
Grade 11 Atomic Structure
Given the number of valence electrons shown in the diagram, what can you conclude about this element?
Electron-Dot Diagram - Neon
  1. It is nonreactive.
  2. It only reacts with elements with 6 valence electrons.
  3. It is reactive with elements that have 1 valence electron.
  4. None of the above
Grade 8 Atomic Structure

This question is a part of a group with common instructions. View group »

Which of the following refers to a charged atom that forms when the numbers of electrons and protons are not equal?
  1. an ion
  2. electron
  3. isotope
  4. proton
Grade 10 Atomic Structure
An atom's valence electrons are those in its                       .
  1. outermost energy level
  2. lowest energy level
  3. electron clouds
  4. inner energy level
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