Study your flashcards anywhere!

Download the official Cram app for free >

  • Shuffle
    Toggle On
    Toggle Off
  • Alphabetize
    Toggle On
    Toggle Off
  • Front First
    Toggle On
    Toggle Off
  • Both Sides
    Toggle On
    Toggle Off
  • Read
    Toggle On
    Toggle Off
Reading...
Front

How to study your flashcards.

Right/Left arrow keys: Navigate between flashcards.right arrow keyleft arrow key

Up/Down arrow keys: Flip the card between the front and back.down keyup key

H key: Show hint (3rd side).h key

A key: Read text to speech.a key

image

Play button

image

Play button

image

Progress

1/26

Click to flip

26 Cards in this Set

  • Front
  • Back
LIST SOME CHARCTERISTICS OF METALS.
1- MOST SOLID AT ROOM TEMP.
2- malleable
3- ductile
4- conduct heat & electricty
5- very high melting point
6- metallic luster
7- metals only react to nonmetals
LIST SOME CHARCTERISTICS OF nonmetals.
1- gas or solid at room temp
2- not malabale
3-4not ductile,not conductive
5-6 density/ melting pointlow
7- reacts w/ both metals & nonmetals
semimetals/ metalloids
a few elements have properties between those of the metals and nonmetals
1-atm
normal pressure
35*c/77
normal room temp
atomic number
indicates number of protons in each atam
physical state of Hg
metal
physical state of Br
nonmetal
Density formula
D = m/V.
Density
Density measures the compactness of matter. The more compact the bigger the density value is.
law of composition
A COMPOUND ALWAYS HAS THE SAME ELEMENTS IN THE SAME PROPORTIONS BY MASS...(WATER)
MOLECULE
single particle composed of 2 or more nonmetal atoms
melting point of water
0*c
physical property
those characteristics of a pure substance that we can observe with out changing the composition of the substance
A chemical property of a pure substance describes its....
chemical reactions with other substances.
in a _________ the chemical composition of the sample does not change
physical change
in a chemical change, what happens to the compisition of the sample?
the composition of the sample changes & we observe a new set of properties.
( antacid tablet in water)
define the law of conservation of mass...
matter is neither created nor destroyed
define the law of definite composition....
compounds always contain the same elements in a constant proportion by mass....H2o, Nacl
give examples of what a physical property refers to
characteristics such as color,density,melting point,conductivity of heat & electricty,solubility & physical state
melting point of water
0*C
single particle composed of two or more nonmetal atoms
MOLECULE
THE ABILITY TO DO WORK.....
energy
what is the difference between potential energy & kinetic energy...
PE of a substance is related to it's chemical compisition, whereas the KE of a substance is related to the motion of its particals.
when we heat a substance what happens to its kinetic energy?
it increases
list 6 forms of energy
1- heat
2- light
3- chemical
4- electrical
5- mechanical
6- nuclear