What is Workplace Hazardous Material Information System.
100
A negatively charged particle.
What is an electron?
100
Oxygen has this many neutrons.
What is 8 neutrons?
200
Attempted to change metals into gold. Invented beakers and filters. Discovered plaster of Paris. Produced the first chemistry textbook.
Who are the Alchemists?
200
K
What is the lemenet symbol for Potassium?
200
This material is represented by a cylinder.
What is compressed gas?
200
A positively charged particle located in the nucleus of an atom.
What is a proton?
200
The the number of neutrons in the element Mendelevium.
What is 157?
(258-101 =157)
300
He believed that matter was made up of tiny particles.
Who is Robert Boyle?
300
Au
What is the element Gold?
300
This symbol indicates an oxidizing material.
What is an "O" with flames on it.
300
A neutral particle of an atom located in the nucleus of the atom. ( Neither positive nor negative.)
What is a neutron?
300
The number of neutrons in the element Rhodium.
What is 58
(103-45=58)
400
This researcher stated that each element is composed of a particle called an atom. He produced a model of an atom called the "Billiard Ball Model".
Who is John Dalton?
400
Ag
What is the element symbol for silver?
400
skull and crossbones inside a red circle.
What is poisonis and infectious causing immediate and serious toxic effects.
400
The combined mass of protons and neutrons.
What is represented by the atomic mass?
400
The number of neutrons in cobalt.
What is 32
(59-27 =32)
500
JJ Thompson.
Who produced the "Raisin Bun Model" which he described as a positively charged sphere in which negatively charged electrons were embedded like raisins in a bun.
500
The atomic number is 34
What is the element Selenium?
500
a poisonous and infectious causing other toxic effects.
What is the big t with a dot under it?
500
The number of protons in an atom. This aslo equals the number of electrons.