Gen Chem Exam 1

How many unpaired electrons are contained in each element: Magnesium

0 unpaired electrons

How many unpaired electrons are contained in each element: Aluminum

1 unpaired electrons

What element has this electron configuration: [Ar]4s1

Potassium

What element fits this description: the element with electrons just filling the first and second shells

Neon

What is the orbital diagram of magnesium?

1s: ^v 2s: ^v 2p:^v ^v ^v 3s: ^v

How many electrons are present in a 3s orbital?

2 electrons

How many unpaired electrons are contained in each element: Oxygen

2 unpaired electrons

How many electrons are present in the second shell?

8 electrons

What element fits this description: the element with a completely filled first shell and three electrons in the second shell

Boron

What element fits this description: the element with a completely filled first and second shell, and seven electrons in the third shell

Chlorine

What element has this electronic configuration: 1s2 2s2 2p6 3s2 3p5

Chlorine

To which blocks do the elements in the fifth period belong?

s block, p block, d block