Periodic Table etc.

Today, how many elements in the periodic table?

• 7

• 18

• 98

• 118

What is K?

• Krypton

• Potassium

• Calcium

• Gold

If an element has an atomic mass of 34 amu, and its electrons are 16, how many protons does it have?

• 16

• 18

• 30

• 34

Tags

NGSS.MS-PS1-1

What is the 20th element in the periodic table?

• Calcium

• Scandium

• Titanium

• Vanadium

Which of the following statements best describes a "covalent bond"?

• (1) A bond between metal and nonmetal

• (2) A bond between two or more nonmetals

• (3) A bond that shares electrons

• Both 2 and 3 are correct.

Analyze the periodic table of elements. Which of the following elements have the highest "electronegativity"?

• Fluorine

• Chlorine

• Bromine

• Iondine

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Analyze the periodic table of elements showing the valence electrons. Which of the following elements does not below to the group?

• Oxygen

• Xenon

• Tellurium

• Sulfur

What will be the type of bond if Fe(iron) and O (oxygen) are combined in specific proportion?

• metallic bond

• covalent bond

• ionic bond

• hydrogen bond

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

Metalloids are elements that have properties intermediate between metals and nonmetals. Which of the pairs are metalloids?

• Boron and Aluminum

• Silicon and Phosphorus

• Antimony and Tellurium

• Polonium and Astatine

Tags

NGSS.MS-PS1-1

All the elements in the periodic table are arranged based on increasing atomic number from left to righ. Which of the following elements are arranged according to "increasing atomic number"?

• Hydrogen, Lithium, Sodium, Potassium, Rubidium

• Titanium, Vanadium, Chromium, Manganese, Iron

• Boron, Silicon, Germanium, Arsenic, Antimony

• Lithium, Magnesium, Scandium, Zirconium, Tantallum

Tags

NGSS.MS-PS1-1