Silicon (Si) is the second most common element in the Earth's crust (oxygen is the most common). The compound silica, also known as silicon dioxide (SiO 2), is formed from silicon and oxygen atoms. Since oxygen and silicon make up about 75% of the Earth, the compound silica is quite common.ilicon (Si) is the second most common element in the Earth's crust (oxygen is the most common). The compound silica, also known as silicon dioxide (SiO 2), is formed from silicon and oxygen atoms. Since oxygen and silicon make up about 75% of the Earth, the compound silica is quite common.
Losing one's Mother is a painful experience. Send comfort to your friend or family member with this lovely sympathy card for the loss of a mother / mom. This image is one of hope, showing the silhouette of a woman with outstretched arms, greeting the sunrise. The hint of a rainbow encircles the figure and the shape of a cross stands alongside her.
The best approach is to thoughtfully acknowledge the loss and send an appropriate gesture of sympathy. A card with just a brief message, such as the samples below, is perfect. 1  May you find peace and love in the memories you cherish. 2  Thinking of you in these difficult times. 3  Our hearts go out to you in your time of sorrow.