Chemistry Exam Review

What is the correct atomic structure for an atom?

• protons and neutrons within a nucleus and the electrons moving around the nucleus

• electrons and neutrons within a nucleus and the protons moving around the nucleus

• protons and electrons within a nucleus and the neutrons moving around the nucleus

• electrons within a nucleus and the protons and neutrons moving around the nucleus

Tags

NGSS.MS-PS1-1

Which elements will have the MOST similar chemical properties?

• Magnesium and calcium

• Calcium and titanium

• Magnesium and zirconium

• Titanium and silicon

What is the chemical symbol for the element Cadmium?

• Ca

• Cm

• Cd

• Cad

Which element on The Periodic Table is in the 5th period and 5th group?

• Iron

• Niobium

• Krypton

• Selenium

What is the atomic number for Praseodymium?

• 140.91

• 141

• 59

• 142.91

Most of the elements on The Periodic Table of Elements are:

• the same

• metals

• nonmetals

• metalloids

Which statement below classifies the following substances correctly:

• Pure substance = chex mix and Heterogeneous Mixture = mixed beans

• Pure substance = water and Heterogeneous Mixture = perfume

• Pure substance = oxygen and Heterogeneous Mixture = chex mix

• Pure substance = sugar water and Heterogeneous Mixture = rock

An unknown substance seems to be very light and heats up quickly. It is showing the properties of

• low density and malleability

• ductility and luster

• low density and conductivity

• brittle and dull

Tags

NGSS.MS-PS1-4

Which statement below is correct:

• metal and nonmetal = covalent bond - Example: H₂O

• nonmetal and metal = covalent bond - Example: NaCl

• nonmetal and nonmetal = ionic - Example: Fe₂O₃

• metal and nonmetal = ionic - Example: NaCl

Which of the following formulas represents a diatomic molecule?

• C₆H₁₂O₆

• O₂

• CO₂

• H₂O

Tags

NGSS.MS-PS1-1