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.
What to Say in a Sympathy Card. The hardest part of sending a sympathy card is that words do not convey well the depths of comfort you wish to send your family, friends, or acquaintances during their time of sorrow.