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Deka Gure Inglês 14 flashcards

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1what are atomsthe building blocks of the universe
2how many atoms are therethere are 188 atoms. 98 of those are found naturally on earth whilke the remaining 20 are made up in laboratories
3what are moleculeswhen atoms combine with other atoms to form a cluster
4what is an elementA substance made up of just one type of atom.
5What is a compoundWhen a substance is made up of different types of atoms.
6How is carbon a unique elementBecause carbon atoms can form extremely large molecules.
7What are atoms made up of?Subtomic particles
8Name the three subatomic particles that atoms are made up ofProtons,Neutrons and Electrons
9Protons and Neutrons form a cluster that sits at the atom . What is that cluster calledThe Nucleus
10The negative charge of an electron causes them to be attracted to the positive charged protons in the nucleus. How is that possible?This is because oppisite electric charges attract each other , a bit like the way oppisite poles of a magnet attract each other.
11What is an atomic numberThe number of protons in an atom
12What is the force that holds the protons together?Nuclear force
13What is the mass number?The number of protons plus neutrons in an atom
14In Rutherford's famous experiment what did he coclude?That atoms are mostly empty space with a small positively charged nucleus and a large negatively charged electron cloud