Parts of an Atom
What is the center part of an atom called?
What is the nucleus
What was the first element discovered and placed on the periodic table?
What is phosphorus
Elements in the vertical direction are called
What is groups
How many valence electrons exist in an atom of Chlorine
What is 7
What are the three states of matter?
What is solid, liquid, and gas
What do you find inside the nucleus of the cell?
What is protons & neutrons.
Who proposed the triads of three elements?
What is Johann Dobereiner
Elements in the horizontal direction are referred to as
What is periods or families
How many electrons are in an atom of neutral sulfur?
What is 16
Which group of elements would be considered the takers?
What is group 18
Where can you find the electrons in an atom?
What is the electron cloud.
Who believe the world was composed of 4 elements earth, air, fire, and water?
What is Democritus Aristotle
Which group is the most reactive?
What is group 1 the Alkali metals
Group 15 has how many valence electrons?
What is 5
What is the maximum number of levels or shells in an atom?
What is 7
Define the atomic mass number.
What is the number of protons and neutrons.
Who proposed that elements should be placed in order based on atomic number?
Who is Henry Mosely
Where are the metalloids located on the periodic table?
What is the zig zag or staircase
How many shell are in one atom of argon?
What is 3
What are the particles like in a gas?
What is moving around with space
How many valence electrons fit into the first level or shell?
What is 2
Who studied the nucleus?
Who is Ernest Rutherford
The periodic table contains how many elements?
What is 118
How many valence electrons are in one atom of helium?
What is two
What is Ms. Dziuk's middle name?
Dawn