endothermic describes a process or reaction that absorbs energy in the form of heat, Chemical endothermic reactions need heat to be performed. In a thermochemical reaction that is endothermic, the heat is placed on the reactants side, A + B + Heat make the product AB, so heat was needed to drive the reaction. Hope this helps!
Covalent bonds form between atoms that need to share their electrons to complete their outer shells. Ionic bonds form between atoms that gain or lose electrons in order to complete their outer shells.
Metals have the following properties: 1. High electric and thermal conductivity due to electrons moving freely within the metal atoms. 2. Shiny appearance due to the de-excitation of electrons 3. Malleable - able to be hammered or beaten into thin sheets 4. Ductile - able to be drawn, pulled, or extruded through a small opening to produce a wire
12 Comments:
hey mrs b what an endothermic reaction?????☺
4:13 PM
endothermic describes a process or reaction that absorbs energy in the form of heat, Chemical endothermic reactions need heat to be performed. In a thermochemical reaction that is endothermic, the heat is placed on the reactants side, A + B + Heat make the product AB, so heat was needed to drive the reaction. Hope this helps!
9:17 PM
☺☻
2:36 PM
Thnks
2:36 PM
can you explain to me the types of chemical bonds
2:39 PM
please....
2:40 PM
<☺>o and the properties of metal too please and thnks
3:10 PM
Covalent bonds form between atoms that need to share their electrons to complete their outer shells. Ionic bonds form between atoms that gain or lose electrons in order to complete their outer shells.
Metals have the following properties:
1. High electric and thermal conductivity due to electrons moving freely within the metal atoms.
2. Shiny appearance due to the de-excitation of electrons
3. Malleable - able to be hammered or beaten into thin sheets
4. Ductile - able to be drawn, pulled, or extruded through a small opening to produce a wire
11:18 PM
what is the frequency. in hertz, that corresponds to each of the following periods? (a) 0.10s (b) 5s (c)1/60s (d) 24h
10:56 AM
frequency is calculated by dividing the number 1 by the period, which is in seconds.
7:57 PM
speed of light?
2:34 PM
300000000 meters/second or 3 x 10^8
3:54 PM
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