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QuestionAnswer
What is an element? a substance that cannot be broken down to other substances by chemical reaction (Ex. Gold, Copper, Silver)
What is a Compound? When two or more elements combined in a fixed ratio.
Life Requires about 25 elements and just four of these C, O; H, and N make up 96% of what kind of matter? Living matter
P. S, Ca, K, and others make up 4% of what weight? organism’s weight
What is a atom? The basic structural units of matter
Atoms can lose or gain electrons to become charged species known as what? Ions
Atoms are composed of: protons (P+) – positively charged particles neutrons (n) – neutral particles electrons (e-)– negatively charged particles
Where are protons and neutrons located in? Nucleus
The atomic number is also the number of Protons
The sum of protons and neutrons is known as the atom’s what? Atomic Mass
Atoms of the same element, having same atomic number but different atomic masses due to the difference in the number of neutrons present are known as? Isotopes
______ is an element that has different atomic weight Isotopes
What is the atomic number for Carbon (C 12.01)? 6
The Mass Number = the sum of protons and neutrons
What is Carbon 13 in isotope notation ? 13 C 6
Find the neutron for this Carbon Isotope: 14 C 6 8
How many neutron are in this Calcium Isotope: 40 Ca 20 20
What is a group of atoms that have an electrical charge is known as? Ions
No charge= Neutral
A group of atoms that have a charge Polyatomic ion
_______have more protons than electrons and are positively charged cations
_____ have more electrons than protons and are negatively charged anions
Created by: samosa
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