Topic 1 TEST

Front

Which subatomic particle is responsible for the identity of an element?

Back

Proton

Front

Which scientist is credited with proposing the first atomic theory based on scientific evidence?

Back

John Dalton

Front

If an atom has 11 protons, 12 neutrons, and 11 electrons, what is its mass number?

Back

23

Front

Which model of the atom first included electrons orbiting the nucleus in specific energy levels?

Back

Bohr’s Model

Front

Explain how the discovery of the electron changed the model of the atom.

Back

It showed atoms have smaller negatively charged particles.

Front

How to determine the number of neutrons in an atom given the atomic number and mass number?

Back

Subtract the atomic number from the mass number.

Front

How are elements arranged in the modern periodic table?

Back

By increasing atomic number

Front

What do elements in the same group (column) of the periodic table have in common?

Back

Same number of valence electrons

Front

Element located in Period 3, Group 1 of the periodic table?

Back

Sodium (Na)

Front

Why are noble gases generally unreactive?

Back

Their outermost energy level is full.