STPM Biology Term 1 Chapter 1

_______ are the building blocks of matter.

• Cells

• Atoms

• Protons

• Electrons

The center of the atom, which contains protons and neutrons, is called the _______________.

• Electron

• Atom

• Proton

• Nucleus

Tags

NGSS.HS-PS1-8

_______ are positively charged particles (p+)

• Protons

• Neutrons

• Electrons

• Neutrinos

___________ are particles with no charge (n).

• Protons

• Neutrons

• Electrons

• Neutrinos

______________ are negatively charged particles (e-) that are found moving around outside the nucleus.

• Protons

• Neutrons

• Electrons

• Neutrinos

A(n) ______________ is a pure substance that cannot be broken down into other substances by physical or chemical means.

• Atom

• Substance

• Compound

• Element

Atoms of the same element that have different numbers of neutrons are called ____________.

• Isotopes

• Elements

• Compounds

• Products

A ____________ is a pure substance formed when two or more elements combine.

• Compound

• Isotope

• Product

• Reactants

Tags

NGSS.MS-PS1-1

The chemical bond that forms when electrons are shared is called a ______________.

• Polar Bond

• Van der waals forces

• Ionic Bond

• Covalent Bond

A ___________ is a compound in which the atoms are held together by covalent bonds.

• Covalent compound

• Ionic compound

• Molecule

• Isotope