atoms
the center of an atom is called the ...?
Nucleus
the periodic table is organized by what?
atomic number
cutting paper is a __________ change
physical
Glucose is a compound or mixture?
compound
the largest animal on earth is the _________
blue whale
the electron orbits the nucleus and has a ________ charge
negative
the atomic number is the same as the number of what?
protons
a puddle froze during a winter cold snap. chemical or physical change?
physical change
What is formed when two or more elements are chemically combined?
a compound
how many earth's could you fit in the sun?
around 1.3 million
Protons have a ________ charge
positive charge
the combination of neutrons and protons gives us which number?
atomic mass
a change in size or shape is a physical or chemical change
physical
Which of the following is a homogeneous mixture? (a) Dirt, (b) Gasoline, (c) Iron nail, (d) Salad. A: (b) Gasoline.
B gasoline
what year did humans land on the moon?
1969
neutrons have no charge and are found where?
in the nucleus
nonmetals are found on which side of the periodic table?
right
you did and experiment and observed bubble of gas being formed Chemical or physical?
chemical
A mixture is:
a) Two or more substances chemically combined
b) Two or more substances physically combined
c) A single pure substance
d) An element only
B
what sport is played at Wimbeldon?
Tennis
how are atoms different from each other?
different numbers of protons
most of the elements on the periodic table are ...
Metals
I fried and egg for breakfast. why is that a chemical change?
becasue it can't be reversed
What is the difference between a homogeneous and heterogeneous mixture?
homogeneous is the same throughout, while heterogeneous is different throughout
who scored the game winning goal to give USA hockey it's first gold medal since the 1980 miracle on ice?
Jack Hughes