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Atomic Structure

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Total cards: 14•Content version: v4•Public deck•Updated: 8/1/2026

Card preview (14)

#1
Front (Question)

What were the five points to Dalton’s model of the atom?

Back (Answer)

• all matter composed of tiny indivisible particles called atoms • atoms cannot be created or destroyed • atoms of the same element are alike in every way • atoms of different elements are different • atoms can combine together in small numbers to form molecules

#2
Front (Question)

compound

Back (Answer)

substance made by chemically combining two or more elements

#3
Front (Question)

Describe the actual model of the atom

Back (Answer)

• made up of sub-atomic particles • nucleus contains protons and neutrons • electrons occupy space outside nucleus

#4
Front (Question)

Why is atomic number important?

Back (Answer)

defining property of element

#5
Front (Question)

mass number

Back (Answer)

number of protons and neutrons

#6
Front (Question)

atomic number

Back (Answer)

number of protons

#7
Front (Question)

isotope

Back (Answer)

atoms of same element with different numbers of neutrons

#8
Front (Question)

ion

Back (Answer)

atom which has gained or lost electrons

#9
Front (Question)

How do isotopes differ from original atom?

Back (Answer)

heavier isotopes diffuse more slowly

#10
Front (Question)

empirical formula

Back (Answer)

simplest whole-number ratio of elements in compound

#11
Front (Question)

hydrated salt

Back (Answer)

compounds that contain fixed ratio of water molecules

#12
Front (Question)

water of crystallization

Back (Answer)

water within crystalline structure of compound

#13
Front (Question)

molecular formula

Back (Answer)

shows all atoms present in a molecule

#14
Front (Question)

How do you calculate molecular formula?

Back (Answer)

X(mass of empirical formula) = molar mass