330 neiep

1cm ball of nuclei would weigh

1 billons tons

Protons are _____ times larger than electrons

1800

Shells capacity is

2n squared n=number or shells

Transfer of electrons occurs when ______

A charged object touches a neutral object

Define element

All atoms are the same

Define negative ion

An atom with excess of electrons

Define nucleus

Center of an atom

Define ionization

Changing balance between protons and electrons

An electric pressure between any two points in a circuit is called

EMF or difference of potential

Atomic nucleus is....

Extremely compact and dense

Glass and rubber are good.......

Insulators

Electrons have a ________ charge.

Negative

Electron current flows from...

Negative to positive

Neutrons have _____ charge.

No charge

Attractive nuclear force us what kind of force?

Nonelectrical force

Why is copper a good conductor of electricity?

Only 1 electron in valence shells

Define valence shell

Outer ring of electrons around the nucleus of an atom

Protons have a _______ charge.

Positive

Define positive ion

Positive charged atom

Conventional current flows from...

Positive to negative

Define molecule

Smallest particle of a compound that can retain same chemical & physical characteristics of compound

Define compound

Two or more different kinds of atoms

Define free electrons

Valence electrons that are dislodged from their shell

Neutral atoms have

an equal number of protons and electrons

Like charges _____ and opposite charges ______

repel, attract