On the basis of Rutherford's Model of an atom, which sub-atomic particle is present in the nucleus of an atom.

• proton and electron

• neutron and electron

• proton and neutron

• proton only

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NGSS.HS-PS1-8

if the first and second energy levels of an atom are full, then what would be the total number of electrons in the atom?

• 6

• 8

• 10

• 18

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NGSS.HS-PS1-1

Which atomic model is proposed by Schrodinger?

• nuclear model

• planetary model

• raisin bread model

• quantum mechanical model

Which electron transition results in the emission of energy?

• 3p to 3s

• 3p to 4p

• 2s to 2p

• 1s to 2s

The symbol "n" in the Bohr theory of atomic structure refers to

• the energy of electron

• the total energy of the atom

• the number of electron in an energy level

• the orbit in which an electron is found

Which of the following sublevels is correctly designated?

• 1p⁵

• 3f⁹

• 2p⁶

• 3d¹¹

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

How many orbitals are in the third principal energy level?

• 3

• 6

• 9

• 2

Which configuration is possible in an excited state of electron?

• ₂He:1s²

• ₁H:1d¹

• ₁₁Na:1s² 2s² 2p⁶ 3d¹

• ₁₀Ne: 1s² 2s² 2p⁵ 3s¹

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What are the orbitals present in the fifth principal energy level?

• s orbital

• s,p orbital

• s,p,d orbitals

• s, p, d, and f orbitals

For a neutral atom with the electron configuration of 1s² 2s² 2p⁵ 3s¹ which statement is false?

• the atomic number is ten

• the 1s and 2s orbitals are filled

• the atom is in the ground state

• the atom is in the excited state

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2