Final Honors Chemistry Sem 1

Front

What is the trend of atomic radius across the periodic table?

Back

Atomic radius decreases across the periodic table from left to right due to increasing nuclear charge, which pulls electrons closer to the nucleus.

Front

What is the photoelectric effect?

Back

The photoelectric effect is the emission of electrons from a material when it absorbs light energy, typically from photons.

Front

Are all physical properties constants?

Back

No, physical properties are not always constants. For example, the density of two different sizes of the same metal would not be the same.

Front

Why is an alpha particle represented as a helium nucleus?

Back

An alpha particle consists of two protons and two neutrons, making it identical to the nucleus of a helium atom.

Front

What is the abbreviated electron configuration for arsenic (As)?

Back

[Ar] 4s² 3d¹⁰ 3p³

Front

What is the definition of a metallic bond?

Back

A metallic bond is the force of attraction between free-moving electrons and metal nuclei, allowing for conductivity and malleability.

Front

What is the difference between ionic and covalent bonds?

Back

Ionic bonds involve the transfer of electrons from one atom to another, while covalent bonds involve the sharing of electrons between atoms.

Front

What is the significance of the noble gas configuration in electron configurations?

Back

Noble gas configurations indicate a stable electron arrangement, often used to simplify the representation of electron configurations.

Front

What is the relationship between mass and volume in density?

Back

Density is defined as mass per unit volume (Density = Mass/Volume), and it varies with the size of the sample.

Front

What is the role of neutrons in an atom?

Back

Neutrons contribute to the mass of an atom and help stabilize the nucleus by offsetting the repulsive forces between protons.