An Organized Table – Worksheet

Who is known as the father of the current day periodic table?

• Albert Einstein

• Dmitrii Mendeleev

• Isaac Newton

• Marie Curie

Answer explanation

Dmitrii Mendeleev is recognized as the father of the modern periodic table for organizing elements by atomic mass and predicting the properties of undiscovered elements, laying the foundation for the current periodic table.

According to the worksheet, the current periodic table is arranged in order of increasing _________

• atomic number

• atomic mass

• density

• melting point

Answer explanation

The current periodic table is arranged by increasing atomic number, which represents the number of protons in an atom's nucleus. This arrangement reflects the periodic law, making atomic number the correct choice.

What does the Periodic Law state?

• Elements are arranged in order of increasing atomic number, with periodic repetition of their physical and chemical properties.

• Elements are arranged alphabetically.

• Elements are arranged by color.

• Elements are arranged by melting point.

Answer explanation

The Periodic Law states that elements are organized by increasing atomic number, leading to a periodic repetition of their properties. This is why the correct choice highlights the arrangement based on atomic number.

Elements in the periodic table are arranged in ______ and ______.

• periods, groups

• rows, columns

• blocks, chains

• families, series

Answer explanation

Elements in the periodic table are arranged in periods (horizontal rows) and groups (vertical columns), which helps categorize elements based on their properties and behaviors. Thus, the correct answer is periods and groups.

Where are metals located on the periodic table?

• Left side

• Right side

• Top

• Bottom

Answer explanation

Metals are primarily located on the left side of the periodic table. This area includes groups 1 and 2, as well as the transition metals, which are known for their metallic properties.

Which of the following is NOT a property of metals?

• A) Malleable

• B) Ductile

• C) Poor conductor of heat

• D) High luster

Answer explanation

Metals are typically good conductors of heat, not poor conductors. Therefore, option C) Poor conductor of heat is NOT a property of metals, while the other options (malleable, ductile, high luster) are characteristic of metals.

Nonmetals are usually ______ at room temperature, but some are solids and Bromine is a liquid.

• gases

• metals

• liquids

• alloys

Answer explanation

Nonmetals are primarily gases at room temperature, with exceptions like solids and the liquid bromine. Thus, the correct answer is gases, as it reflects the general state of nonmetals.

Tags

NGSS.MS-PS1-4

Metalloids have properties of both metals and nonmetals. A metalloid may behave as a metal under some conditions, but the same metalloid may behave as a nonmetal under other conditions. Which of the following best describes a metalloid?

• Only behaves like a metal

• Only behaves like a nonmetal

• Can behave like both a metal and a nonmetal

• Behaves like neither a metal nor a nonmetal

Answer explanation

Metalloids possess characteristics of both metals and nonmetals, allowing them to behave as either depending on the conditions. Therefore, the best description is that they can behave like both a metal and a nonmetal.

According to the instructions, what color should you use for metalloids?

• Pink

• Blue

• Green

• Yellow

Answer explanation

According to the instructions, metalloids are designated with the color pink. Therefore, the correct choice is pink.

Label the following element as a metal, non-metal, or metalloid: C

• Metal

• Non-metal

• Metalloid

Answer explanation

C, or carbon, is classified as a non-metal. It is a key element in organic chemistry and is known for its ability to form various compounds, unlike metals which typically conduct electricity and have a shiny appearance.