Physical Science_SHS

What is the atomic number?

• The mass of an atom in atomic mass units

• The total number of particles in the nucleus

• The number of protons in an atom

• The number of neutrons in an atom

Who demonstrated that the atomic number determines most properties of an element?

• Dmitri Mendeleev

• Ernest Rutherford

• Henry Gwyn-Jeffreys Moseley

• Albert Einstein

What is a particle accelerator used for?

• To measure atomic weight

• To speed up protons for nuclear reactions

• To capture free electrons

• To observe x-ray emissions

What are elements with atomic numbers greater than 92 called?

• Halogens

• Alkali metals

• Transuranium elements

• Noble gases

What did Dmitri Mendeleev create?

• The theory of relativity

• The concept of nucleosynthesis

• The periodic table based on atomic weight

• The first atomic model

What is x-ray spectroscopy used for?

• To determine atomic mass

• To classify elements by their chemical properties

• To detect and measure photons in the X-ray spectrum

• To synthesize new elements

What are the columns in the periodic table called?

• Rows

• Groups

• Periods

• Blocks

Which group contains alkali metals?

• Group 7

• Group 2

• Group 1

• Group 0

What is the lightest element on the periodic table?

• Helium

• Lithium

• Oxygen

• Hydrogen

What did Rutherford's gold foil experiment demonstrate?

• Atoms cannot be transformed into other elements

• Atoms are mostly empty space

• Atoms are solid and indivisible

• Atoms have equal numbers of protons and electrons