Physical science 3.8

According to the scientific theory of atoms, which of the following statements best describes the location of electrons?

• A. in the nucleus of the atom

• B. both in the nucleus and around it

• C. outside the nucleus and often far from it, in the electron cloud

• D. outside the nucleus, in very rigid orbits around the nucleus

The nucleus of most atoms is composed of which of the following sub-atomic particles?

• A. tightly packed protons

• B. tightly packed neutrons

• C. tightly packed protons and neutrons

• D. loosely connected protons and electrons

Tags

NGSS.MS-PS1-1

Which scientist discovered the atom is made up of mostly empty space with a small, dense, positively charged nucleus?

• A. Niels Bohr

• B. Ernest Rutherford

• C. J.J. Thompson

• D. John Dalton

Tags

NGSS.HS-PS1-8

The image above shows a model of the atom. Which subatomic particle does the arrow in the image above identify?

• A. electron

• B. neutron

• C. orbital

• D. proton

Tags

NGSS.MS-PS1-1

Which person proposed the atomic model seen here?

• A. Bohr

• B. J.J. Thompson

• C. Rutherford

• D. Democritus

Tags

NGSS.MS-PS1-1

Which of the following statements was part of Dalton’s atomic theory? Choose all that apply.

• A. All elements are composed of atoms.

• B. Atoms are indivisible.

• C. Compounds are formed by joining two or more atoms.

• D. Atoms of the same element have different masses and properties.

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NGSS.HS-PS1-7

Which scientist's model proposed each electron in a specific energy level or orbital?

• A. Ernest Rutherford

• B. Niels Bohr

• C. John Dalton

• D. J.J. Thompson

What two subatomic particles add together to calculate the mass number of an atom?

• A. protons and electrons

• B. neutrons and electrons

• C. protons and neutrons

• D. orbitals and electrons

What subatomic atomic particle determines the identity of the atom?

• A. proton

• B. electron

• C. neutron

• D. nucleus

What subatomic particle is always equal to the atomic number?

• A. proton

• B. electron

• C. neutron

• D. nucleus