WorksheetsGrade 8 Chemistry chapter 4
Total questions: 24
Worksheet time: 17mins
According to Dalton's atomic theory, atoms are indestructible and indivisible. True or False?
True
False
According to Dalton's atomic theory, different atoms are combined in fixed, whole number ratios to form _________
Compounds
Molecules
Isotopes
Mixtures
Which THREE postulates of Dalton's atomic theory have been proven false by later research?
All matter is made up of atoms
Atoms are indivisible and indestructible
Atoms of different elements have different masses
All atoms of the same element have identical properties
Atoms combine in fixed, whole-number ratios to form compounds
The cathode ray was composed of __________ charged particles.
Positively
Negatively
Neutrally
None of the above
The name given to the positive electrode is called ?
Cathode
Anode
Anion
Cation
What is material that has mass and takes up space?
volume
mass
matter
density
Which of the following is NOT a subatomic particle?
protons
neutrons
ions
electrons
............................. is the way in which electrons are arranged in various orbitals around the nuclei of atoms.
Electron configuration
Proton configuration
Neutron configuration
Who came up with the idea for the 'plum pudding' atomic structure?
Dalton
J.J. Thomson
Rutherford
Bohr
What charge does the nucleus have?
Positive
Negative
Neutral
What type of bond is shown in the image?
Hydrogen
Ionic
Covalent
What are valence electrons?
electrons that are in the electron cloud
all the electrons in an atom
electrons in outer shell of an atom
