Grade 9 Chemistry topic 2 Quiz

What were the first tools made of?

The periodic table has 10 families of elements.

Who named the basic particles of the atom?

Ernest Rutherford proposed that ____________ have a nucleus

A ____________ is a negatively charged particle

A proton is a ___________ charged particle

Not everything can be explained on a

Without this layer in our stratosphere we are unprotected from the sun's radiation and get skin cancer easily.

An orbit of electrons around the nucleus of an atom is

Who thought that everything that existed could be explained with a single diagram?

What element is in most organic/living things?

In 1200 BC which group of people discovered how to get iron from rocks?

A major air pollutant on earth is

After he was guillotined ____________ finished Antoine Lavoisier's work in Chemistry

Four examples of matter that have been studied because of their value.

Today we use several varieties of ____________ to organize elements

What were the smallest things in molecules 200 years ago?

Where did the word chemistry come from?

What is the mass of one atom of an element called?

Philosopher Democritus used the word ______ to describe the smallest particles that couldn't be broken down any further.

The first Chemists/Alchemists/experimenters started experimenting about _________ years ago?

What things are usually made of copper?

Celestial symbols?

Neils Bohr suggested that ______________ were outside the nucleus.

Electrons orbit the _____________

Atomic mass is

A compound formed when a metal and non-metal elements combine.

Gold has a high value because of its ____ and ____.

What is the atomic mass of hydrogen?

How many elements are on the current periodic table?

What is the food that JJ Thomson used for the model of the atom

A positively charged particle in the nucleus of an atom

An ____________is a negatively charged particle