atoms
what is a atom
the smallest unit of a chemical element
At room temperature and pressure, these are the only two elements that exist as liquids.
What are mercury and bromine?
what is matter
anything that has mass
What is positive (or +1)?
Protons and neutrons are found together in this dense, central part of an atom.
What is a neutral (or zero) charge?
What is the electric charge of this subatomic particle, which shares the atomic nucleus with the proton?
Protons and neutrons.
What is hydrogen?
states of matter
solid, liquid, gas, and plasma
What is the nucleus?
Protons and neutrons are found together in this dense, central part of an atom.
Who is James Chadwick
Who is James Chadwick This British physicist received the Nobel Prize in 1935 for his 1932 discovery of the neutron.
The atomic number.
What is carbon?
Properties and Phase Changes
physical transformations between states solid, liquid, gas, plasma
What is the atomic number?
This number, unique to each element, is determined by the number of protons in an atom's nucleus
What is fifteen minutes?
A free neutron, outside of an atom's nucleus, exists for an average of about this many minutes before decaying into a proton, an electron, and an antineutrino.
In a neutral atom, which two subatomic particles are always equal in number?
Protons and electrons.
The symbol Fe on the periodic table stands for this common metal.
What is iron?
What are solids, liquids, and gases?
three fundamental states of matter
What is the atomic number?
Answer: This number, unique to each element, is determined by the number of protons in an atom's nucleus.
What is hydrogen (specifically, hydrogen-1 or protium)?
The only type of atom that typically does not contain any neutrons is an atom of this element
An atom of Carbon has 6 protons and 6 neutrons. What is its mass number?
12.
is an element positive or negative or neutral
element itself is neutral
what is a solid
a state of matter characterized by closely packed particles (atoms, molecules, or ions
What is the mass number?
The combined total of protons and neutrons in an atom's nucleus is known as this number.
?What are quarks?
Neutrons and protons are both made up of smaller particles with fractional charges, known as these.