Atomic Theory and Bonding Flashcards Preview

N5 Chemistry RM > Atomic Theory and Bonding > Flashcards

Flashcards in Atomic Theory and Bonding Deck (18):
1

Valency

the no. of bonds an element or ion. can form

2

ion

charged particle formed by the losing or gaining of electrons

3

mass no. =

number of protons + neutrons

4

electrons have a mass of ____ and are _____ charged

almost 0, negatively

5

neutrons mass:___ charge:___

m=1 c=neutral

6

protons mass:__ charge: ___

m=1 c=+1

7

isotope

atoms with same atomic number, different mass numbers (same no. protons, different no. neutrons)

8

metal atoms ______ to form ______

lose electrons, positive ions

9

non-metal atoms ______ to form ______

gain electrons, negative ions

10

a bond between two non-metal elements is

covalent molecule OR carbon diamond, carbon graphite and silicon dioxide are covalent networks

11

properties of covalent molecule

low mp/bp, never conduct

12

properties of covalent network

high mp/bp, don't conduct

13

what is a bond between a metal and a non-metal called, and what are its properties

ionic, high mp/bp, conduct when liquid or dissolved

14

what structure occurs in ionic bonding

ionic lattice

15

what is a bond between a metal and a metal called, and what are its properties

metallic, high mp/bp, conducts

16

why do ionic compounds not conduct when solid

ions are not free to move

17

why do ionic compounds have high mp

to melt an ionic compound millions of strong ionic bonds must be broken, this requires a lot of energy

18

covalent molecular substances have _______? (bonds)

strong covalent bonds within the molecule and weak bonds between molecules