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WorksheetsElements and Atoms Review
Total questions: 18
Worksheet time: 11mins
What type of substance cannot be broken down into simpler substances?
Elements
Compounds
Mixtures
How many elements do we know of today?
90
118
217
What is the smallest piece of matter that can still be identified as its element?
Protons
Atoms
Nucleus
Who was the FIRST person to suggest matter was made up of atoms?
Democritus
John Dalton
Dmitri Mendeleev
What particles exist within the nucleus of the atom? Choose ALL that apply.
Protons
Neutrons
Electrons
Which particles have an electrical charge (positive OR negative)? Select all that apply.
Protons
Neutrons
Electrons
Which particles have a mass of about 1 atomic mass unit (amu)? Select all that apply.
Protons
Neutrons
Electrons
The atomic number of an element tells you how many of WHAT particles that atom has? Select all that apply.
Protons
Neutrons
Electrons
An isotope of carbon has an atomic number of 6 and a mass number of 14.
How many protons does that isotope have?
(a)
An isotope of carbon has an atomic number of 6 and a mass number of 14.
How many neutrons does that isotope have?
(a)
The electron cloud of an atom is broken down into smaller pieces called...
the nucleus
cloud formations
energy levels
When an electron releases energy and falls to a lower energy lever, it releases that energy as...
light
sound
heat
What is true about chemical symbols?
Every element has a chemical symbol
Every symbol is one letter
Every symbol is based on the element's English name
Who was responsible for creating the first periodic table of elements?
Dmitri Mendeleev
Niels Bohr
John Dalton
What is the name of a vertical column on the periodic table?
Period
Group
Table
What type of element is most common?
Metals
Metalloids
Nonmetals
Which properties do metals have? Select all that apply.
Bad conductors of heat and electricity
Shiny luster
Can be shaped into a ball
Which group of elements does not like to react with other elements to form compounds?
Halogens
Noble gases
Carbon group
