Chemistry
What is matter?
Anything that has mass and take up space
The number of protons in an atom of an element is its ______________.
What is : atomic number / atomic weight
Neutron is _______ charged
What is : uncharged/ neutral
What two particles make up the net charge of an atom nucleus? For example, K+
What is : protons and electrons
This variable is also known as the manipulated variable in a hypothesis.
Independent variable
How many protons in Carbon?
6
The positively charged particle of an atom is _______
Proton
Electrons are _____ charged.
What is : negatively
What two particles that makes up the atomic mass of an atom?
protons and neutrons
An educated guess in an experiment
hypothesis
What is the atomic weight for element "Ca"
20
Where is the proton and neutron located in an atom?
Nucleus
Define valence electrons
Electrons in the outermost shell of an atom
A _____ is a very small particle that is the basic unit of matter.
What is atom
Part of the lab report that describes the procedure of the experiment
Method
How many electrons are in Cl-2?
19
Mass number equals to the sum of _____ and ______ in an atom.
proton, neutron
Define element.
Pure substance made of only one kind of atom
___________ is the space where electrons with equal energy occupy or locate
shells
What is a control variable?
Any other variables in an experiment you keep the same to ensure fair results.
Recite the first 20 elements of the periodic table in its full name
H, He, Li, Be, B, C, N, O, F, Ne, Na, Mg, Al, Si, P, S, Cl, Ar, K, Ca
Describe the difference between atomic number and mass number
The atomic number is the number of proton in an atom. The Mass number is the sum of the number of protons and neutrons in an atom of a particular isotope.
Define "dependent variable"
Results or what you measure in an experiment. It depends on the changes of the independent variable.
An atom is electrically neutral because
the numbers of protons and electrons are equal.
The correct order of a lab report for a scientific experiment is: (7-8)
Title, Aim, Hypothesis, Materials, Method, Results, (Discussion), Conclusion