Properties Of Matter And Their Measurement

Question 1

two types of properties

Answer 1

physical and chemical

Question 2

what are physical properties

Answer 2

which can be measured or observed without changing the identity or composition of the substance

Question 3

what are chemical properties

Answer 3

which can be measured only with a chemical reaction
cannot be determined by just viewing or touching the substance
ex acidity, basicity, combustibility, reactivity

Question 4

a measured physical quantity is expressed in two parts

Answer 4

a numerical coefficient and a unit

Question 5

base physical quantities and their units

Answer 5

length (l) – metre (m)
mass (m) – kilogram (kg)
time (t) – second (s)
electric current (I) – ampere (A)
thermodynamic temperature(T) – kelvin (K)
amount of substance (n) – mole (mol)
luminous intensity (Iv) – candela (cd)