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.
A family grieving the death of one of their own can often find a degree of peace upon receiving a thoughtfully written sympathy card in the mail. Once you hear that someone you know has experienced a loss, buy an appropriate sympathy card and take some time to craft a thoughtful message.