Science Midterm Review

What type of ion is commonly formed by Metals in group 1 on the periodic table?

• 1+ ion

• 1- ion

• 2+ ion

• 2- ion

A stable binary compound of Cl- and Ca2+ is formed. What is the chemical formula for this compound?

• CaCl2

• CaCl

Tags

NGSS.MS-PS1-1

A negatively-charged ion always has more ________ than _______.

• Neutrons than protons

• electrons than protons

• protons than electrons

The elements neon and argon are not reactive. Why?

• They are stable.

• They have the maximum number of electrons in the valence shell

• I have no clue

Which element is a nonmetal?

• Chlorine (Cl)

• Iron (Fe)

• Magnesium (Mg)

• Zinc (Zn)

7. Due to the Law of Conservation of Matter, how many grams of carbon dioxide (CO₂) are formed in the reaction?

CH₄ + 2O₂ CO₂ + 2H₂O

32grams + 138grams ____ + 72grams

• 88 grams

• 98 grams

• 242 grams

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

A light bulb and a solution are made part of an electrical circuit. When the circuit is connected to a battery, what type of solution will carry enough electrical charge to make the light bulb glow brightly?

• a weak acid

• a weak base

• a salt solution

11. What type of reaction is shown in the following example?

NaCl + AgNO₃ -------> AgCl + NaNO₃

• synthesis

• single replacement

• double replacement

What coefficient of KCl will balance the equation?

‗CuS + ‗KCl → ‗CuCl₂+ ‗K₂S

• 1

• 4

• 3

• 2

Tags

NGSS.HS-PS1-7

An _____ bond is formed between oppositely charged ions; _____ and nonmetals are likely to be oppositely charged.

• covalent, nonmetal

• covalent, metal

• ionic, nonmetal

• ionic, metal