Chemistry MOCK ACP Sem 1

Front

What distinguishes solids from other states of matter?

Back

Solids maintain an ordered pattern of particles.

Front

What does the electron sea model explain about metals?

Back

The electron sea model explains why metals are excellent conductors.

Front

Why are metals malleable and ductile?

Back

Metals are malleable and ductile because the valence electrons move freely, reducing repulsive forces between positive charges when atoms are moved.

Front

What trend is observed in atomic radius and ionization energy when moving down a family on the periodic table?

Back

Atomic radius increases and ionization energy decreases.

Front

What is the empirical formula of a compound?

Back

The empirical formula is the simplest whole-number ratio of elements in a compound.

Front

How do you determine the molecular formula from the empirical formula?

Back

To find the molecular formula, divide the molar mass by the empirical formula mass and multiply the subscripts in the empirical formula by that number.

Front

What is the molar mass of CH2?

Back

The molar mass of CH2 is 14 g/mol.

Front

What is the significance of valence electrons in metallic bonding?

Back

Valence electrons in metals are delocalized, allowing them to move freely and contribute to conductivity and malleability.

Front

What is ionization energy?

Back

Ionization energy is the energy required to remove an electron from an atom in the gas phase.

Front

What happens to ionization energy as you move across a period in the periodic table?

Back

Ionization energy generally increases as you move from left to right across a period.