Periodic quiz

Using your knowledge of the periodic table, which of these statements is correct about nitrogen?

• nitrogen has the same number of energy levels as oxygen.

• nitrogen's element symbol is Ni

• nitrogen has fewer energy levels than boron

• nitrogen has the same number of valence electrons as fluorine

What is the element from the following characteristics: highly reactive, 3 energy levels, 1 valence electrons, good conductor. (a)  

• phosphorus
• bromine
• krypton
• sodium

Which of the following statements is true about the elements in blue.

• They are metals

• They are non-metals

• They are rare earth metals

• They are metalloids

Which of the following statements in NOT true of Krypton, argon, and neon? (a)  

• They are reactive
• They are not reactive
• They have 8 valence electrons
• They are noble gases

Mendeleev Noticed that is he organized the elements by atomic weight certain patterns emerged. For instance, elements in the same group appeared to have the same _______.

• valence electrons

• energy levels

• number of neutrons

• atomic mass

Which statements are true about the elements with the atomic number 17?​ ​ (a)   ​ (b)   ​ ​ (c)   ​ (d)  

• non-metal

• 7 valence electrons

• period 3

• group 17

• metal

All metalloids have properties of ​ (a)   and ​ (b)   ​

• metals
• non-metals
• conductors
• valence electrons
• periods
• groups
• elements
• energy levels

​ (a)   is a non-reactive element.

• xenon
• sulfur
• iron
• strontium

What important trend can be observed when viewing elements from left to right on the periodic table.

• The elements change from liquids to gases.

• The elements change from metals to non-metals.

• The elements change from reactive to non-reactive.

• The elements change from 2 energy levels to 3 energy levels.

This unknown metal has 5 energy levels and 2 valence electrons. It is very reactive and is solid at room temperature . What is this element?