Physical And Chemical Properties And Changes
Bohr Rutherford Diagram
Periodic Table
Classification Of Matter
Atoms
100
What is the ability of a substance to catch fire?
Answer: Flammability
100
What is the central part of an atom that contains protons and neutrons?
Nucleus
100
What is the element in Group 1 that is highly reactive with water?
Sodium
100
What is a pure substance made of only one type of atom?
Element
100
What is the positively charged particle found in the nucleus of an atom?
Proton
200
What is a change in size, shape, or state without altering chemical composition?
Physical change
200
What is the maximum number of electrons that can occupy the second shell of an atom?
8
200
What is the group of elements in Group 18 known for their non-reactivity?
Noble gases
200
What is a substance made of two or more elements chemically combined?
Compound
200
What is the neutrally charged particle found in the nucleus of an atom?
Neutron
300
What is the chemical reaction that releases heat and light when a substance burns?
Combustion
300
What are the electrons in the outermost shell of an atom?
Valence electrons
300
What element has the atomic number 6 and is essential for life?
Carbon
300
What is a mixture where the components are evenly distributed and cannot be distinguished?
Homogeneous mixture
300
What is an electron cloud?
This is the area where electrons are most likely to be found around an atom's nucleus.
400
What is the reaction of a substance with oxygen to form a new compound?
Oxidation
400
How many electrons are in the third shell of a chlorine atom (with 17 protons)?
7
400
What is the group of elements in the center of the periodic table known for their ability to conduct electricity?
Transition metals
400
What is a mixture in which the components can be physically separated and are visibly distinct?
Heterogeneous mixture
400
What is the atomic number?
The number of protons in an atom determines the element's atomic number.
500
What is a process where a new substance with different properties is formed?
Chemical change
500
Nitrogen
500
What is the alkaline earth metal with the atomic number 20, commonly found in bones and teeth?
Calcium
500
What is a substance that can only be separated by chemical means, not physical?
Compound
500
What is an atom?
This is the smallest unit of matter that still retains the properties of an element.