IB Chemistry Review Quiz

1. What is the sum of all coefficients when the following equation is balanced using the smallest possible whole numbers?

_____ C₄H₁₀ + _____O₂ --> _____CO₂ + _____H₂O

Tags

NGSS.HS-PS1-7

What is the total number of carbon atoms in 2.5 mol of benzamide, C₆H₅CONH₂?

Which statement about the numbers of protons, electrons and neutrons in an atom is always correct?

• The number of neutrons minus the number of electrons is zero.

• The number of protons plus the number of neutrons equals the number of electrons.

• The number of protons equals the number of electrons.

• The number of neutrons equals the number of protons.

Tags

NGSS.HS-PS1-7

Which statements about the isotopes of chlorine-35 and chlorine-37 are correct?

I. They have the same chemical properties

II. They have the same atomic number

III. They have the same physical properties

• I and II only

• I and III only

• II and III only

• I, II and III

What is the electron arrangement of the Mg²⁺ ion?

• 2,2

• 2,8

• 2.8.2

• 2,8,8

Tags

NGSS.HS-PS1-1

Which property generally decreases across period 3?

• Atomic number

• Electronegativity

• Atomic radius

• First ionization energy

Which property increases up group 1?

• Ionization energy

• Melting point

• Reactivity

• Atomic radius

An element is in group 14 and period 3 of the periodic table. How many electrons are in the highest occupied energy level of an atom of this element?

• 3

• 4

• 12

• 14

Tags

NGSS.HS-PS1-1

Which particles are responsible for electrical conductivity in metals?

• anions

• cations

• electrons

• protons

Tags

NGSS.HS-PS2-5

The number of electrons in the valence shell of elements A and B, are 6 and 7 respectively. What is the formula and type of bonding in a compound formed by these elements?

• A₂B, covalent

• AB₂, covalent

• A₂B, ionic

• AB₂, ionic

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2