Atoma

The particles with no charge in an atom are the _______.

• electrons

• neutrons

• protons

• protons and neutrons

Tags

NGSS.MS-PS1-1

What is the basic unit of a chemical element, consisting of a nucleus surrounded by electrons?

• Atom

• Molecule

• Compound

• Ion

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5

Which subatomic particle has a positive charge and is found in the nucleus of an atom?

• Electron

• Proton

• Neutron

• Photon

What is the term for the number of protons in the nucleus of an atom, which determines the chemical properties of an element?

• Atomic Mass

• Atomic Number

• Isotope

• Valence

Which model of the atom describes electrons orbiting the nucleus in fixed paths?

• Bohr Model

• Quantum Mechanical Model

• Plum Pudding Model

• Rutherford Model

What is the name of the negatively charged subatomic particle that orbits the nucleus of an atom?

• Proton

• Neutron

• Electron

• Positron

Which element has the atomic number 1 and is the lightest element?

• Helium

• Hydrogen

• Lithium

• Beryllium

What is the term for atoms of the same element that have different numbers of neutrons?

• Isotopes

• Ions

• Molecules

• Compounds

What is the smallest particle of a chemical element that retains its chemical properties?

• Atom

• Molecule

• Ion

• Compound

Which scientist is credited with the discovery of the electron?

• Niels Bohr

• Albert Einstein

• J.J. Thomson

• Ernest Rutherford