Chemistry 1 Pre-Test Ridge View High School

What does the position of an element in the periodic table primarily indicate?

• Its age

• Its atomic number

• Its electron affinity

• Its mass

Tags

NGSS.HS-PS1-1

The outermost electrons of an atom are known as what?

• Core electrons

• Valence electrons

• Neutron electrons

• Proton electrons

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which of the following statements about ionic bonds is correct?

• They form between two nonmetals.

• They involve the transfer of electrons.

• They are generally weaker than covalent bonds.

• They do not involve any charges.

Tags

NGSS.HS-PS1-1

NGSS.HS-PS2-4

What type of reaction occurs when sodium reacts with chlorine?

• Decomposition

• Synthesis

• Single replacement

• Double replacement

Which of the following trends is observed in the periodic table as you move from left to right across a period?

• Atomic radius increases

• Electronegativity decreases

• Ionization energy generally increases

• Metallic character increases

What is the primary factor that affects the rate of a chemical reaction according to collision theory?

• The color of the reactants

• The temperature of the reactants

• The size of the containers

• The shape of the reactants

Tags

NGSS.HS-PS1-5

When a chemical reaction occurs, what happens to the total mass of the reactants and products?

• It decreases

• It increases

• It remains constant

• It varies randomly

Tags

NGSS.HS-PS1-7

Which of the following best represents a molecule formed by covalent bonds?

• NaCl

• H2O

• MgO

• CaCl2

Which factor does NOT influence the boiling point of a substance?

• Molecular weight

• Type of bonding

• Color of the substance

• Presence of intermolecular forces

According to Le Chatelier's Principle, what happens when the concentration of reactants in a closed system is increased?

• The equilibrium shifts to favor products

• The equilibrium shifts to favor reactants

• The equilibrium remains unchanged

• The reaction stops completely

Tags

NGSS.HS-PS1-5