Science 10 Review Flashcards
properties of acids:
- sour
- pH less than 7
- Litmus turns red
- conducts electricity
- reacts with some metals to make H2 gas
what do protons equal
atomic number
characteristics of metals:
- good conductors of heat and electricity
- solids at room temp
- lose electrons to form positive ions
- shiny
- very dense
- high melting points
What direction is the group?
vertical columns
characteristics of non-metals:
- can be gas(mostly), liquid or solid
- They aren’t shiny (lustrous)
- they don’t conduct heat or electricity well
- gain electrons to form negative ions
what do electrons equal
number of protons
physical properties of matter:
- bioling point
- melting/freezing point
- solubility
- conductivity
what is the charge for the groups on the periodic table?
Group 1:+1
Group 2: +2
Group 3: +3
Group 4: +4
Group 5: -3
Group 6: -2
Group 7: -1
Group 8: 0
how to tell a compound is a base?
it contains OH
molecular compound properties:
low melting and boiling points
- low solubility
-not good conductors of electricity
- soft, crumble
properties of bases:
- bitter taste
- pH greater than 7
- litmus turns blue
- conducts electricity
- slippery feel
- contain OH
what direction are periods?
horizontal rows
Numbers up to ten and their prefixes:
1: mono
2: di
3: tri
4: tetra
5: penta
6: hexa
7: hepta
8: octa
9: nona
10: deca
what does the period of an element represent?
number of rings that the element has
what do the groups mean?
number of valence electrons and charge
What are the super 7 elements and what are the 2 exceptions?
- Nitrogen (N2)
- Oxygen (O2)
- Fluorine (F2)
- Chlorine (Cl2)
- Bromine (Br2)
- Hydrogen (H2)
- Iodine(I2)
- Sulphur(S8)
- Phosphorus(P4)
ionic compound properties:
- high melting points
- retention of crystal shape
- brittle
- conductivity in solution
charged particles that are mobile(electrolytes) - latice
how to get neutrons?
mass number - atomic number(protons)
formula unit:
the smallest ratio of cations and anions that yield a neutral charge
molecules:
- formed when electrons are SHARED
- called COVALENT bond
- 2 non-metals
-charges not involved
evidence of chemical change:
- energy change(exo or endothermic)
- odors
- colour change
- formation of gas(bubbles)
- formations of solid(precipitate)
