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Define ionic bond in your own words.

An atom that changes so that it has an electrical charge is a(n) .

Use the term metallic bond in a sentence.

Identify: What is another name for a homogeneous mixture?

Contrast homogeneous and heterogeneous mixtures.

1) Ionic bonding is a type of chemical bonding that involves the electrostatic attraction between oppositely charged ions, and is the primary interaction occurring in ionic compounds. It is one of the main types of bonding along with Covalent bonding and Metallic bonding. Ions are atoms with an electrostatic charge

2)Electric potential energy

3)In metals, electrons are shared amongst the whole crystal in metallic bonding. In metals, electrons are shared in metallic bonding. Alloys are defined by a metallic bonding character. Molten gallium is therefore a very nonvolatile liquid thanks to its strong metallic bonding.()

4)solution

5)*homogeneous:its a mixture that dosen't hve solid particles n is clear n its particles r small in size

  *heterogeneous : its a mixture that contains solid particles n is opaque n its particles r large in size

a mercury barometer is a device that uses the physical properties of mercury in a tube to measure barometric pressure. mercury barometers are used for : -

1. measurement of atmospheric pressure  

2. determining the altitude of a place

3. weather forecasting

4. calibration and checking of aneroid barometers

5. application in fluid mechanics

6. measurement of pressure in aircrafts

7. surface weather analysis

8. preparation of barographs

9. usage in physical sciences like physics, astronomy & chemistry

10. preparation of aircraft altimeters

characteristics of mercury barometer : -

1.used to define and measure atmospheric pressure.

2.on the average at sea level the column of mercury rises to a height of about 760 mm.

3.this quantity is equal to 1 atmosphere.

4.it is also known as standard atmospheric pressure.

5.a barometer in which the weight of a column of mercury in a glass tube with a sealed top is balanced against that of the atmosphere pressing on an exposed cistern of mercury at the base of the mercury column, the height of the column varying with atmospheric pressure.

geosphere and hydrosphere.

this is because the geosphere has to do with geological events, while the hydrosphere controls all water on earth.