Elements
Period
Protons are found in what part of the atom?
The nucleus/center
What is the smallest subatomic particle?
An electron
This is test many times by many scientists and same or similar result usually happens?
A theory
Carbon has how many valence electrons? Most important element to all living things
4 (four)
An isotope has a different number of?
Neutrons
An electron has what kind of charge?
Negative
Atomic mass is made up of what?
Protons and neutrons
What is 4 of the 6 parts of an experiment?
Control, control group, Independent variable, dependent variable, time, measurement.
On a PH scale 7 is known as what?
A combination of two or more atoms of different elements is known as?
A compound
How many electrons can go in the 3rd level?
18 electrons
If an element loses an electron that element becomes positive or negative?
Becomes positive
These are number observations?
Quantitative observations
Glucose is an example of which macromolecule? Carbohydrates, lipids, protein or nucleic acid
Carbohydrates
A substance that cannot be broken down into simpler substances is known as?
An element
An atom
Name 4 out of the 5 main elements that make up your body:
Nitrogen, hydrogen, calcium, oxygen, carbon
In an experiment that part that is deliberately changed is known as the?
Independent variable
This property of water holds together like substances?
An element has an atomic number of 23, how many valence electrons does it have?
13 valence electrons
When electron is being shared it is known as a __________ bond?
Covalent
An atom that has a charge is known as a(n)
Ion
For an experiment to be valid it must be what?
Repeatable
This macromolecule is used for long term energy storage for the body? Protein, carbohydrates, nucleic acid, or lipid
Lipids