Question

1. practice: turn off show electron dot diagram. use the gizmo to create a neutral atom of each of the following elements. draw an electron dot diagram for each. when you are finished, turn on show electron dot diagram and check your answers. h he li be b c n o f ne na mg al si 6. extend your thinking: many chemical properties are determined by the number of valence electrons. elements with the same number of valence electrons will have similar properties. which element has similar properties to lithium? __________ beryllium? ________ explain: __________

Explanation:

Step1: Recall periodic - table trends

Elements in the same group have similar chemical properties due to the same number of valence electrons.

Step2: Identify group of lithium

Lithium (Li) is in Group 1 of the periodic table. Sodium (Na) is also in Group 1, so it has similar properties to lithium.

Step3: Identify group of beryllium

Beryllium (Be) is in Group 2 of the periodic table. Magnesium (Mg) is also in Group 2, so it has similar properties to beryllium.

Step4: Provide explanation

Elements in the same group have the same number of valence electrons which determines their chemical behavior.

Answer:

Which element has similar properties to lithium? Sodium (Na)
Beryllium? Magnesium (Mg)
Explain: Elements in the same group have the same number of valence electrons and thus similar chemical properties.