Matter Flashcards
Describe the Electron Cloud Model of an atom
The current theory is that electrons move randomly in a cloud around the nucleus.
What parts can be found in an atom
nucleus, protons, neutrons, electrons, empty space
Why does an atom have neutral charge
The proton is positive, the electron is negative, therefore the charges cancel each other out = neutral
Define Element
made up of one kind of atom
Identify some elements
Gold, iron, silver, oxygen, carbon, hydrogen, sulfur
How many elements occur naturally on earth
92
Define molecule
When 2 or more atoms join together (atoms can be the same or different)
Define compound
substances made up of 2 or more unlike elements
How are molecules and compounds different
Molecules can be made up of 2 or more identical atoms or 2 or more different atoms.
Compounds are made up of 2 or more different elements.
How are elements different from compounds
Elements are made up of all the same atoms. Compounds are made up of all different atoms.
Who is Dymitry Mendeleyev?
He is the first person to invent the periodic table of elements.
Why is the Periodic Table important?
It shows the order between elements
What makes up all matter
atoms, space
How can scientists understand the activity of atoms when individual atoms are not seen?
Scientists study the characteristics of large amount of atoms which helps them understand a single atom
How does this study add to your understanding of who God is
…your answer…
