Nobel Prize Winners in Chemistry

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Who predicted the properties of undiscovered elements and left gaps in the periodic table for their inclusion?

William Ramsay
Henry Moseley
Dmitri Mendeleev (correct)
Ernest Rutherford

Who discovered the noble gases?

Ernest Rutherford
Dmitri Mendeleev
William Ramsay (correct)
Henry Moseley

What is the basis of the modern periodic table?

Nuclear model of the atom
Electron energy levels
Atomic number (correct)
Atomic weight

Who proposed the nuclear model of the atom?

Ernest Rutherford (A) Signup and view all the answers

Who created new elements that do not occur naturally?

Glenn Seaburg (A) Signup and view all the answers

Who contributed to the understanding of atomic structure by proposing the concept of electron energy levels?

Niels Bohr (D) Signup and view all the answers

What determines the chemical properties and placement of an element within the periodic table?

Number of valence electrons (C) Signup and view all the answers

How does the atomic radius change across a period in the periodic table?

It decreases (D) Signup and view all the answers

What is the type of element that has seven valence electrons?

Halogens (C) Signup and view all the answers

Which of the following trends is observed down a group in the periodic table?

Atomic radius increases, and electronegativity decreases (B) Signup and view all the answers

What is the main reason for the trends observed across a period in the periodic table?

Increasing nuclear charge (B) Signup and view all the answers

What is the characteristic of elements in the same group?

They have the same number of valence electrons (D) Signup and view all the answers

What is the result of an atom or molecule losing one or more electrons?

It becomes a cation (C) Signup and view all the answers

What is the byproduct of combustion that emits light as it reaches high temperatures?

Carbon particles (D) Signup and view all the answers

What is necessary for complete combustion to occur?

Sufficient oxygen (D) Signup and view all the answers

What is the chemical equation for the complete combustion of methane (CH4)?

CH4 + 2O2 → CO2 + 2H2O (D) Signup and view all the answers

What type of reaction is combustion?

A chemical reaction that releases a large amount of light and heat (A) Signup and view all the answers

What is the term for an atom or molecule that has gained or lost one or more electrons, resulting in a net electrical charge?

Ion (B) Signup and view all the answers

What is the primary result of a neutralisation reaction?

Formation of water and a salt (C) Signup and view all the answers

What type of reaction is decomposition?

Decomposition reaction (D) Signup and view all the answers

What is required to initiate a decomposition reaction?

Heat, light, or electricity (C) Signup and view all the answers

What is formed during a neutralisation reaction besides water?

A salt (C) Signup and view all the answers

What is a characteristic of a neutralisation reaction?

It is an exothermic reaction (C) Signup and view all the answers

What is the result of a complete neutralisation reaction?

A solution that can be acidic, basic, or neutral (A) Signup and view all the answers

What is the main function of the endometrium?

To nourish and protect a fertilized egg (B) Signup and view all the answers

What is the primary component of the myometrium?

Smooth muscle cells (B) Signup and view all the answers

What is the purpose of the cervical mucus during ovulation?

To facilitate sperm movement into the uterus (C) Signup and view all the answers