Atoms
_________ is defined as the basic unit of a chemical element, which cannot be broken down further.
Atom
What is the symbol for Iron?
Fe
Which year was the periodic table invented?
A. 1868
B. 1869
C. 1870
B. 1869
The ancient Egyptian word "khēmia" means:
transmutation of earth
Which Greek philosopher hypothesized that everything we see is made of very small, indivisible units?
Democritus
Water is made up of hydrogen and what else?
Oxygen
Which Greek word can be used to describe a particle that could not be further subdivided?
Atomos
What is the symbol for Silver?
Ag
Although there is helium on Earth, it was first discovered by observing which planet?
The Sun
What are the 3 states of matter?
Solid, Liquid, Gas
Which scientist created the model of the atom?
Niels Bohr
Bronze is a mix of how many metals?
2
___________ is the center of an atom.
Nucleus
Which element is the lightest?
Hydrogen
By their properties
What is the 4th state of matter?
Plasma
Which English Chemist was known for introducing the atomic theory?
John Dalton
What 2 metals make up Bronze?
A. Copper & Tin
B. Copper & Silver
C. Copper & Gold
A. Copper & Tin
Name that particle:
Which particles in the nucleus of an atom have a positive (+) electric charge?
Protons
TRUE!
Metals expand as they are heated, and this can cause metal structures to stretch with temperature changes.
There are ______ elements on the periodic table.
A. 80
B. 99
C. 118
C. 118
What are the 3 properties of Matter?
Density, Mass, & Volume
Which scientist discovered the electron?
J.J. Thompson
Where do most minerals come from?
A. Earth's surface
B. Earth's atmosphere
C. Beneath Earth's crust
C. Beneath Earth's crust
Name that particle:
Which particles is in the nucleus of an atom and have no electric charge?
Neutrons
What is the most common state of matter in the universe?
Plasma
Basically a soup of gases that have been stripped of some of their electrons, at extreme temperatures. As far as we know, it’s the most abundant because stars are mostly plasma!
Which scientist was the inventor of the period table?
Dmitri Mendeleev
List 3 examples of a gas.
Air, Carbon Dioxide, & Helium
Alfred Nobel, creator of the Nobel Prize, was most famous for which invention?
Dynamite
Photosynthesis is a chemical process through which plants produce?
A. Water
B. Glucose
C. Lactic Acid
B. Glucose
Name that particle:
Which particles are not in the nucleus that have a negative (-) electric charge?
Electrons
Which is denser? Water or Ice?
Water.
This is why ice floats.
What is the symbol of Arsenic?
As
Physical Change vs. Chemical Change: In a physical change, matter changes form but not chemical identity. In a chemical change, a chemical reaction occurs & new products are formed.
What are the following 3 changes, a physical change or a chemical change:
1. Melting Ice=
2. Burning Wood=
3. Chopping Wood=
1. Melting Ice= Physical Change
2. Burning Wood= Chemical Change
3. Chopping Wood= Physical Change
Which scientist codiscovered the chemical elements radium and polonium; made numerous pioneering contributions to the study of radioactive elements; carried out the first research into the treatment of tumors with radiation?
A. Dmitri Mendeleev
B. Marie Curie
C. Ernest Rutherford
B. Marie Curie
What is sodium chloride most commonly known as?
A. Salt
B. Baking Soda
C. Vinegar
A. Salt