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ATOMS
FORCES
ELEMENT
RADIOACTIVITY
LEVELS
100

THE FUNDAMENTAL PROPERTY OF MATTER THAT CAN BE EITHER POSITIVE OR NEGATIVE. 

ELECTRIC CHARGE

100

THE ATTRACTIVE FORCE BETWEEN ELECTRONS AND PROTONS. 

ELECTROMAGNETIC FORCE

100

THE NUMBER OF PROTONS IN THE NUCLEUS OF AN ATOM.

ATOMIC NUMBER

100

THIS MEANS THE NUCLEUS STAYS TOGETHER. 

STABLE

100

THE FIRST ENERGY LEVEL CAN ACCEPT UP TO HOW MANY ELECTRONS?

2 (TWO)

200

A PARTICLE WITH A NEGATIVE ELECTRIC CHARGE AND FOUND OUTSIDE THE NUCLEUS. 

ELECTRON

200

THE STRONGEST FORCE KNOWN TO SCIENCE. 

STRONG NUCLEAR FORCE

200

THESE ARE ATOMS THAT HAVE A DIFFERENT NUMBER OF PROTONS THAN ELECTRONS AND SO HAVE A NET ELECTRIC CHARGE. 

IONS

200

A PROCESS IN WHICH THE NUCLEUS SPONTANEOUSLY EMITS PARTICLES AS IT CHANGES INTO A MORE STABLE ISOTOPE. 

RADIOACTIVITY

200

THE SECOND ENERGY LEVEL CAN HOLD UP TO HOW MANY ELECTRONS?

8 (EIGHT)

300

THE TINY CORE AT THE CENTER OF AN ATOM WHICH CONTAINS MORE THAN 99 PERCENT OF THE ATOM'S MASS. 

NUCLEUS

300

THIS FORCE IS WEAKER THAN BOTH THE ELECTRIC FORCE AND STRONG NUCLEAR FORCE. 

WEAK FORCE

300

ATOMS OF THE SAME ELEMENT THAT HAVE DIFFERENT NUMBERS OF NEUTRONS. 

ISOTOPES

300

WHEN THIS OCCURS, THE NUCLEUS EJECTS TWO PROTONS AND TWO NEUTRONS. 

ALPHA DECAY

300

NITROGEN HAS AN ATOMIC NUMBER OF 7.

HOW MANY ELECTRONS ARE IN THE SECOND ENERGY LEVEL?

5 (FIVE)

400

A PARTICLE WITH A POSITIVE CHARGE AND FOUND INSIDE THE NUCLEUS OF THE ATOM. 

PROTON

400

ELECTRONS OCCUPY THE SPACE OUTSIDE THE NUCLEUS IN A REGION CALLED?

ELECTRON CLOUD

400

THE NUMBER OF PROTONS PLUS THE NUMBER OF NEUTRONS IN THE NUCLEUS. 

MASS NUMBER

400

THIS OCCURS WHEN A NEUTRON IN THE NUCLEUS SPLITS INTO A PROTON AND AN ELECTRON. 

BETA DECAY

400

LITHIUM HAS AN ATOMIC NUMBER OF 3. 

HOW MANY ELECTRONS ARE IN THE SECOND ENERGY LEVEL?

1 (ONE)

500

A PARTICLE WITH NO CHARGE AND FOUND INSIDE THE NUCLEUS OF THE ATOM.

NEUTRON

500

THIS PARTICLE HAS ABOUT THE SAME MASS AS A PROTON.

NEUTRON

500

THESE WERE THE FIRST PARTICLES DISCOVERED THAT ARE SMALLER THAN ATOMS. (J.J. THOMSON)

ELECTRONS

500

IN THIS TYPE OF DECAY, THE NUMBER OF PROTONS AND NEUTRONS STAYS THE SAME.  

GAMMA DECAY

500

SODIUM HAS AN ATOMIC NUMBER OF 11. 

HOW MANY ELECTRONS ARE IN THE THIRD ENERGY LEVEL?

1 (ONE)